Kalshi Pro Baseball Playoff Matchups Data
Every Kalshi “Pro Baseball Playoff Matchups” contract of the day — every trade print and the complete Level-2 book, captured co-located with nanosecond venue and receive timestamps. 57 trading days as day bundles, €1 per day, bought as a guest with instant download.
Pro Baseball Playoff Matchups on Kalshi — activity
Trades and USD turnover summed over every contract of the series across 10 captured days to 2026-10-13, from the recorded tick data — the per-day averages divide by the captured days. Buy share, quoted spread (in contract price cents, 0..1 = 100 ¢), best-bid/ask depth and Level-2 update counts are turnover-weighted over the same window.
One purchase, the whole series for a day
A series-day bundle contains every Pro Baseball Playoff Matchups contract that was listed on Kalshi on that UTC day — traded or not — 4 contract files on the latest covered day. Each file carries the full raw feed: every trade print with price, size and side, plus Level-2 order-book updates, in the same zstd-compressed schema as our crypto venues. Event contracts quote 0..1; turnover is USD-normalized.
Coverage runs August 2026 – present — 57 trading days, 563 MB compressed in total. A day typically holds 73 contract files (up to 108 on the busiest day, 26.7 MB). Pick individual days in the shop calendar for €1 each; delivery is an instant per-file download or one archive for the whole day.
Pro Baseball Playoff Matchups — development since capture
5,489 trades and $136.7K of USD turnover over 57 captured days since 2026-08-18 — record day 2026-09-30 with $32.5K, biggest single contract KXMLBMATCHUP-TB1ST26-NYY (MLBMATCHUP · NYY) (2026-10-01, $18.3K).
| Month | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|
| Oct 2026 | 13 | 3,089 | $66.4K | $5.1K | 93 | 2.2M | −5.6 % |
| Sep 2026 | 30 | 2,394 | $70.3K | $2.3K | 173 | 12.4M | +130981.3 % |
| Aug 2026 | 14 | 6 | $53.62 | $3.83 | 5 | 5.7M | — |
Kalshi Pro Baseball Playoff Matchups — trades and USD turnover summed per calendar month (UTC) over every contract, from our own daily statistics of the recorded tick data. Days = captured UTC days; a partial month shows no month-over-month change. Contracts traded and L2 (order-book) updates exist for days captured with the extended statistics.
MLB markets on other prediction venues
Polymarket, predict.fun, OG.com also list MLB event markets — the same 30-day statistics side by side, each a day bundle of its own.
| Venue · series | Trades (30d) | Turnover (30d) | Avg spread | Top-1 depth | L2 updates / trade | Days archived | Price / day |
|---|---|---|---|---|---|---|---|
| Kalshi · Pro Baseball Playoff Matchups (this page) | 1,999 | $22.3K | 7.13 ¢ | $801.28 | 749.7 | 57 | €1 |
| Polymarket · MLB (games & props) | 89,291 | $21.5M | 2.12 ¢ | $61.4K | 736.4 | 414 | €1 |
| predict.fun · MLB (games & props) | 7,740 | $699.9K | 1.44 ¢ | $33.3K | 223.1 | 21 | €1 |
| OG.com · MLB (games & props) | 146,368 | $8.6M | 2.09 ¢ | $57.9K | 282.3 | 24 | €1 |
30-day window of the statistics table, per venue's own series; spread in contract-price cents and best-bid/ask depth are turnover-weighted, L2 updates per trade = recorded order-book level updates ÷ trades. "—" = no statistics row in the window. Each venue settles its own contracts on its own rules — the series are comparable in subject, not interchangeable.
Pro Baseball Playoff Matchups — activity by weekday and hour
Thursdays carry the most turnover, about $3.6K per day. Contracts listed to settle 04:00–04:59 UTC take 74 % of the turnover of the most traded contracts.
| Weekday (UTC) | Avg turnover / day | USD | Avg trades | Days |
|---|---|---|---|---|
| Monday | $1.4K | 148.5 | 2 | |
| Tuesday | $2.6K | 170.5 | 2 | |
| Wednesday | $3.4K | 359 | 1 | |
| Thursday | $3.6K | 323 | 1 | |
| Friday | $2.8K | 146 | 1 | |
| Saturday | $77.5 | 9 | 1 | |
| Sunday | $2.2K | 262 | 2 |
Kalshi Pro Baseball Playoff Matchups — average USD turnover and trades per weekday over the captured days of the last 30, from our own daily statistics; weekdays without a captured day show —.
| Settles (UTC) | Turnover | USD | Share | Trades | Contracts |
|---|---|---|---|---|---|
| 00:00–00:59 | $587.1 | 0.4 % | 47 | 24 | |
| 04:00–04:59 | $98.5K | 73.6 % | 2,203 | 68 | |
| 05:00–05:59 | $34.7K | 25.9 % | 2,858 | 81 | |
| 18:00–18:59 | $124.48 | 0.1 % | 7 | 2 |
Kalshi Pro Baseball Playoff Matchups — USD turnover and trades of the most traded contracts per day, grouped by the UTC hour in which the contract is listed to settle (the venue's close time), over the newest 30 captured days; from our tick archive.
Pro Baseball Playoff Matchups — last 30 days in the archive
Files, size, contracts traded, trades, USD turnover, buy share, quoted spread, top-of-book depth and order-book updates per UTC day, from the recorded tick data.
| UTC day | Files | Size | Traded | Trades | Turnover | Buy share | Avg spread | Top-1 depth | L2 updates | Notes | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-10-13 | 4 | 11.0 KB | 2 | 10 | $1.2K | 1 % | — | — | 97 | Buy day → | |
| 2026-10-12 | 4 | 54.5 KB | 2 | 3 | $35.04 | 9 % | — | — | 1.1K | Buy day → | |
| 2026-10-11 | 4 | 2.27 MB | 2 | 191 | $2.8K | 39 % | 19.9 ¢ | $4.1K | 92.1K | Buy day → | |
| 2026-10-10 | 4 | 154 KB | 2 | 9 | $77.5 | 62 % | 1.00 ¢ | $1.5K | 5.4K | Buy day → | |
| 2026-10-09 | 4 | 3.38 MB | 2 | 146 | $2.8K | 84 % | 3.13 ¢ | $722.31 | 137.7K | Buy day → | |
| 2026-10-08 | 8 | 5.01 MB | 8 | 323 | $3.6K | 84 % | 8.16 ¢ | $549.23 | 201.0K | Buy day → | |
| 2026-10-07 | 8 | 2.64 MB | 8 | 359 | $3.4K | 77 % | 4.82 ¢ | $59.21 | 101.8K | Buy day → | |
| 2026-10-06 | 18 | 2.61 MB | 9 | 331 | $4.1K | 80 % | 4.33 ¢ | $173.06 | 97.7K | Buy day → | |
| 2026-10-05 | 18 | 4.34 MB | 8 | 294 | $2.7K | 66 % | 2.75 ¢ | $206.31 | 168.2K | Buy day → | |
| 2026-10-04 | 18 | 16.5 MB | 8 | 333 | $1.6K | 85 % | 9.61 ¢ | $27.93 | 693.7K | Buy day → | |
| 2026-10-03 | 18 | 3.78 MB | 8 | 307 | $3.2K | 90 % | 4.63 ¢ | $119.65 | 151.1K | Buy day → | |
| 2026-10-02 | 63 | 4.82 MB | 14 | 309 | $8.8K | 89 % | 5.31 ¢ | $1.7K | 183.0K | Buy day → | |
| 2026-10-01 | 63 | 10.0 MB | 20 | 474 | $32.1K | 48 % | 13.7 ¢ | $5.1K | 386.1K | Buy day → | |
| 2026-09-30 | 63 | 21.6 MB | 29 | 1,033 | $32.5K | 63 % | 2.69 ¢ | $236.87 | 837.2K | Buy day → | |
| 2026-09-29 | 63 | 19.5 MB | 27 | 888 | $24.3K | 94 % | 4.07 ¢ | $481.51 | 754.9K | Buy day → | |
| 2026-09-28 | 108 | 1.07 MB | 26 | 285 | $10.5K | 99 % | 11.4 ¢ | $231.31 | 31.4K | Buy day → | |
| 2026-09-27 | 90 | 168 KB | 5 | 30 | $280.79 | 92 % | 31.4 ¢ | $125.89 | 1.8K | Buy day → | |
| 2026-09-26 | 90 | 240 KB | 4 | 17 | $334.78 | 71 % | 18.6 ¢ | $2.0K | 3.4K | Buy day → | |
| 2026-09-25 | 90 | 2.53 MB | 8 | 16 | $276.26 | 99 % | 23.3 ¢ | $214.28 | 84.6K | Buy day → | |
| 2026-09-24 | 90 | 5.91 MB | 7 | 15 | $57.81 | 78 % | 15.5 ¢ | $77.54 | 222.7K | Buy day → | |
| 2026-09-23 | 90 | 6.23 MB | 7 | 17 | $156.85 | 54 % | 17.9 ¢ | $60.62 | 230.4K | Buy day → | |
| 2026-09-22 | 90 | 2.76 MB | 2 | 5 | $111.67 | 100 % | 10.8 ¢ | $45.85 | 93.6K | Buy day → | |
| 2026-09-21 | 90 | 1.75 MB | 4 | 12 | $75.76 | 100 % | 16.0 ¢ | $61.15 | 55.6K | Buy day → | |
| 2026-09-20 | 90 | 4.83 MB | 3 | 8 | $276.65 | 99 % | 15.6 ¢ | $120.91 | 173.9K | Buy day → | |
| 2026-09-19 | 90 | 4.74 MB | 6 | 7 | $228.3 | 97 % | 20.5 ¢ | $138.61 | 165.5K | Buy day → | |
| 2026-09-18 | 90 | 2.35 MB | 4 | 5 | $33.12 | 100 % | 20.7 ¢ | $136.77 | 56.4K | Buy day → | |
| 2026-09-17 | 90 | 3.84 MB | 6 | 11 | $37.98 | 94 % | 18.4 ¢ | $116.49 | 107.5K | Buy day → | |
| 2026-09-16 | 90 | 15.5 MB | 6 | 8 | $77.84 | 83 % | 20.0 ¢ | $468.37 | 570.1K | Buy day → | |
| 2026-09-15 | 90 | 12.9 MB | 4 | 5 | $4.86 | 99 % | 20.6 ¢ | $531.71 | 478.8K | Buy day → | |
| 2026-09-14 | 90 | 8.22 MB | 0 | 0 | $0 | — | — | — | 298.4K | Buy day → |
Traded = contracts with at least one trade that day. Buy share = taker-buy side of USD turnover. Avg spread = quoted bid-ask spread in contract price cents (0..1 = 100 ¢), weighted by turnover across the day’s contracts. Top-1 depth = mean of the best bid and best ask notional in USD, weighted by turnover. L2 updates = order-book level updates recorded across all contracts of the day. Days captured before the extended statistics show —.
Most traded Pro Baseball Playoff Matchups contracts by day
The ten contracts with the most USD turnover per UTC day — open, high, low, close, VWAP and the outcome implied by the last print; the six previous days fold out below.
The 2 most traded Pro Baseball Playoff Matchups contracts on 2026-10-13 — 1 closed Yes (≥ 0.97), 1 closed No (≤ 0.03): 10 trades, $1.2K USD turnover. The busiest contract was KXMLBMATCHUP-26ALCS-TBCLE with $1.2K turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 7 | $1.2K | 0 % | — | — | 43 | buy file → |
| KXMLBMATCHUP-26ALCS-NYYCLE MLBMATCHUP · NYYCLE | 2026-10-13 05:10 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 3 | $6.56 | 100 % | — | — | 25 | buy file → |
Prices quote 0..1 (probability of Yes). Open/high/low/close/VWAP are that UTC day’s trade prints per contract; the implied outcome reads the last print — ≥ 0.97 as Yes, ≤ 0.03 as No, anything between as still open — venues publish the official result. Buy share = taker-buy side of turnover; spread = the contract's turnover-weighted quoted bid-ask spread in cents, top-1 depth = mean best-bid/ask notional per side, L2 updates = order-book level updates recorded for the contract that day. “Settles” is the venue-listed close time of the contract where the venue publishes one (UTC).
2026-10-12 — 2 contracts, 3 trades, $35.04 turnover
The 2 most traded Pro Baseball Playoff Matchups contracts on 2026-10-12 — 1 closed Yes (≥ 0.97), 1 closed No (≤ 0.03): 3 trades, $35.04 USD turnover. The busiest contract was KXMLBMATCHUP-26ALCS-TBCLE with $31.76 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.990 | 0.990 | 0.990 | 0.990 | 0.990 | Yes | 2 | $31.76 | 0 % | — | — | 334 | buy file → |
| KXMLBMATCHUP-26ALCS-NYYCLE MLBMATCHUP · NYYCLE | 2026-10-13 05:10 | 0.010 | 0.010 | 0.010 | 0.010 | 0.010 | No | 1 | $3.28 | 100 % | — | — | 289 | buy file → |
2026-10-11 — 2 contracts, 191 trades, $2.8K turnover
The 2 most traded Pro Baseball Playoff Matchups contracts on 2026-10-11 — 1 closed Yes (≥ 0.97), 1 closed No (≤ 0.03): 191 trades, $2.8K USD turnover. The busiest contract was KXMLBMATCHUP-26ALCS-TBCLE with $2.6K turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.570 | 0.990 | 0.570 | 0.990 | 0.909 | Yes | 130 | $2.6K | 39 % | 20.4 ¢ | $4.3K | 56.1K | buy file → |
| KXMLBMATCHUP-26ALCS-TBCWS MLBMATCHUP · TBCWS | 2026-10-13 05:10 | 0.440 | 0.470 | 0.010 | 0.010 | 0.047 | No | 61 | $115.79 | 34 % | 9.48 ¢ | $28.83 | 35.5K | buy file → |
2026-10-10 — 2 contracts, 9 trades, $77.5 turnover
The 2 most traded Pro Baseball Playoff Matchups contracts on 2026-10-10 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 2 still open at the last print: 9 trades, $77.5 USD turnover. The busiest contract was KXMLBMATCHUP-26ALCS-TBCWS with $62.68 turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26ALCS-TBCWS MLBMATCHUP · TBCWS | 2026-10-13 05:10 | 0.450 | 0.450 | 0.440 | 0.440 | 0.445 | open | 8 | $62.68 | 53 % | 1.00 ¢ | $1.6K | 4.7K | buy file → |
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.570 | 0.570 | 0.570 | 0.570 | 0.570 | open | 1 | $14.82 | 100 % | 1.00 ¢ | $1.0K | 384 | buy file → |
2026-10-09 — 2 contracts, 146 trades, $2.8K turnover
The 2 most traded Pro Baseball Playoff Matchups contracts on 2026-10-09 — 0 closed Yes (≥ 0.97), 0 closed No (≤ 0.03), 2 still open at the last print: 146 trades, $2.8K USD turnover. The busiest contract was KXMLBMATCHUP-26ALCS-TBCWS with $2.3K turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26ALCS-TBCWS MLBMATCHUP · TBCWS | 2026-10-13 05:10 | 0.700 | 0.870 | 0.420 | 0.450 | 0.691 | open | 72 | $2.3K | 82 % | 3.07 ¢ | $707.26 | 80.0K | buy file → |
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.310 | 0.590 | 0.140 | 0.570 | 0.415 | open | 74 | $538.57 | 91 % | 3.36 ¢ | $785.64 | 57.1K | buy file → |
2026-10-08 — 8 contracts, 323 trades, $3.6K turnover
The 8 most traded Pro Baseball Playoff Matchups contracts on 2026-10-08 — 1 closed Yes (≥ 0.97), 4 closed No (≤ 0.03), 3 still open at the last print: 323 trades, $3.6K USD turnover. The busiest contract was KXMLBMATCHUP-26ALCS-TBCWS with $1.9K turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26ALCS-TBCWS MLBMATCHUP · TBCWS | 2026-10-13 05:10 | 0.640 | 0.800 | 0.610 | 0.700 | 0.745 | open | 61 | $1.9K | 85 % | 7.02 ¢ | $254.07 | 49.1K | buy file → |
| KXMLBMATCHUP-26NLCS-MILLAD MLBMATCHUP · MILLAD | 2026-10-08 05:21 | 0.610 | 0.990 | 0.610 | 0.990 | 0.864 | Yes | 71 | $1.1K | 92 % | 11.3 ¢ | $1.3K | 44.6K | buy file → |
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.250 | 0.350 | 0.250 | 0.310 | 0.306 | open | 38 | $213.06 | 88 % | 5.51 ¢ | $55.24 | 31.1K | buy file → |
| KXMLBMATCHUP-26NLCS-SDLAD MLBMATCHUP · SDLAD | 2026-10-08 05:21 | 0.170 | 0.320 | 0.010 | 0.010 | 0.107 | No | 73 | $185.1 | 64 % | 5.88 ¢ | $39.83 | 52.8K | buy file → |
| KXMLBMATCHUP-26NLCS-SDATL MLBMATCHUP · SDATL | 2026-10-08 05:21 | 0.050 | 0.050 | 0.010 | 0.050 | 0.017 | open | 11 | $89.31 | 2 % | 3.87 ¢ | $32.91 | 394 | buy file → |
| KXMLBMATCHUP-26ALCS-NYYCWS MLBMATCHUP · NYYCWS | 2026-10-13 05:10 | 0.100 | 0.120 | 0.010 | 0.010 | 0.043 | No | 28 | $32.03 | 35 % | 5.04 ¢ | $22.86 | 19.0K | buy file → |
| KXMLBMATCHUP-26ALCS-NYYCLE MLBMATCHUP · NYYCLE | 2026-10-13 05:10 | 0.010 | 0.090 | 0.010 | 0.010 | 0.046 | No | 21 | $26.46 | 84 % | 13.6 ¢ | $147.47 | 881 | buy file → |
| KXMLBMATCHUP-26NLCS-MILATL MLBMATCHUP · MILATL | 2026-10-08 05:21 | 0.140 | 0.150 | 0.010 | 0.010 | 0.041 | No | 20 | $20.27 | 1 % | 8.88 ¢ | $28.99 | 3.2K | buy file → |
2026-10-07 — 8 contracts, 359 trades, $3.4K turnover
The 8 most traded Pro Baseball Playoff Matchups contracts on 2026-10-07 — 0 closed Yes (≥ 0.97), 1 closed No (≤ 0.03), 7 still open at the last print: 359 trades, $3.4K USD turnover. The busiest contract was KXMLBMATCHUP-26NLCS-MILLAD with $2.3K turnover.
| Contract | Settles (UTC) | Open | High | Low | Close | VWAP | Implied outcome | Trades | Turnover | Buy share | Spread | Top-1 depth | L2 updates | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| KXMLBMATCHUP-26NLCS-MILLAD MLBMATCHUP · MILLAD | 2026-10-08 05:21 | 0.650 | 0.840 | 0.590 | 0.610 | 0.724 | open | 101 | $2.3K | 69 % | 4.71 ¢ | $61.7 | 19.2K | buy file → |
| KXMLBMATCHUP-26NLCS-SDLAD MLBMATCHUP · SDLAD | 2026-10-08 05:21 | 0.100 | 0.240 | 0.050 | 0.170 | 0.193 | open | 72 | $437.5 | 98 % | 5.46 ¢ | $49.6 | 30.4K | buy file → |
| KXMLBMATCHUP-26ALCS-TBCLE MLBMATCHUP · TBCLE | 2026-10-13 05:10 | 0.150 | 0.350 | 0.090 | 0.250 | 0.152 | open | 41 | $353.77 | 97 % | 4.82 ¢ | $42.69 | 9.4K | buy file → |
| KXMLBMATCHUP-26ALCS-TBCWS MLBMATCHUP · TBCWS | 2026-10-13 05:10 | 0.720 | 0.770 | 0.640 | 0.640 | 0.736 | open | 23 | $183.51 | 71 % | 6.97 ¢ | $104.56 | 11.9K | buy file → |
| KXMLBMATCHUP-26ALCS-NYYCWS MLBMATCHUP · NYYCWS | 2026-10-13 05:10 | 0.170 | 0.190 | 0.100 | 0.100 | 0.161 | open | 20 | $77.32 | 97 % | 2.68 ¢ | $13.43 | 10.4K | buy file → |
| KXMLBMATCHUP-26NLCS-MILATL MLBMATCHUP · MILATL | 2026-10-08 05:21 | 0.210 | 0.210 | 0.050 | 0.140 | 0.122 | open | 54 | $72.28 | 73 % | 2.58 ¢ | $44 | 16.0K | buy file → |
| KXMLBMATCHUP-26NLCS-SDATL MLBMATCHUP · SDATL | 2026-10-08 05:21 | 0.040 | 0.050 | 0.020 | 0.050 | 0.044 | open | 32 | $22.02 | 100 % | 2.24 ¢ | $55.31 | 3.1K | buy file → |
| KXMLBMATCHUP-26ALCS-NYYCLE MLBMATCHUP · NYYCLE | 2026-10-13 05:10 | 0.040 | 0.090 | 0.010 | 0.010 | 0.038 | No | 16 | $13.33 | 92 % | 2.61 ¢ | $114.4 | 1.4K | buy file → |
MLB on Kalshi — market types across the series
Across 72 MLB series on Kalshi, 883,314 contracts have been listed as of 2026-11-02: player & team props 601,750 · total / over-under 90,394 · spread / handicap 30,874 · moneyline / winner 20,954 and others. Counted from every contract file of the family, not from the traded top-10.
| Market type | Contracts listed (all time) | Listed last 30 days | Share |
|---|---|---|---|
| player & team props | 601,750 | 7,269 | 68 % |
| total / over-under | 90,394 | 1,529 | 10 % |
| spread / handicap | 30,874 | 355 | 3 % |
| moneyline / winner | 20,954 | 1,087 | 2 % |
| period markets | 14,547 | 279 | 2 % |
| strike ladder | 212 | 0 | 0 % |
| other | 124,583 | 3,110 | 14 % |
| Total | 883,314 | 13,629 | 100 % |
Kalshi MLB series— market type read from each contract's venue identifier (ticker suffix on Kalshi, slug suffix on Polymarket, market description on predict.fun and OG.com), counted over every contract listed in the family as of 2026-11-02; “listed last 30 days” counts contracts whose venue settlement time falls in that window. Every one of them is in the day bundle of its day.
How a Pro Baseball Playoff Matchups contract trades
On Kalshi, a Pro Baseball Playoff Matchups contract trades for about 15 days from open to close, is listed roughly 25 min before it opens, and quotes in 1 ¢ price steps (0..1). Measured on the 2 contracts captured on 2026-10-13.
Build a Pro Baseball Playoff Matchups model on this data
Every settled Pro Baseball Playoff Matchups contract is a labelled example: the winner, the line or the total that cleared is the label, and the day bundle holds each contract's full order-book path and trade tape, nanosecond-stamped, from the first quote days before the event to the last print — the features for that label. The statistics on this page cover the most traded contracts per day; the bundle holds every contract listed on Kalshi that day.
Split by season and match day, never at random — the contracts of one slate share injuries, weather and the same public money, and a random split leaks the slate's results into training; walk forward over game days and purge the days whose contracts were still open. The sports-model guide works the closing-line benchmark, the pre-game line path and that split through.
Purchased data is for your own use — backtesting, research, analytics and training your own models, in-house or in your own products; the trained models and derived data you build from it are yours. The raw files and tick streams themselves may not be redistributed, resold or published. The full terms are on the data license page.
Why buy Kalshi Pro Baseball Playoff Matchups data here
Four things every page on this site is built on — and the reason the numbers above exist at all.
We record everything
The complete public feed of each venue as it was published: every Level-2 snapshot and update at the venue's full book depth, every trade with its aggressor side, every quote, funding, mark-price and liquidation event — for every instrument the venue lists, every UTC day since we added the venue. Nothing sampled, no top-N cut, no on-demand capture.
Institutional grade
Captured co-located at the venue with the exchange timestamp and our receive timestamp in integer nanoseconds, an event-id chain that makes any gap visible, and one normalized schema across 35+ venues — the same capture our own high-frequency trading engine and enterprise feeds run on.
€1 per instrument-day
Any instrument-day is €1, series-day bundles start at €1 — no subscription, no minimum order, no tiers to unlock. Credit packs lower the effective price and never expire, and every venue has free full-day samples to test against first.
Self-service for everyone
Pick the days in the Data Shop, pay by card as a guest and download immediately — no sales call, no enterprise contract, no KYC. Coding agents buy the same files through the MCP server, and the free Agent Skill teaches them the format.
Agents: /llms.txt · MCP server /mcp · every page as markdown via Accept: text/markdown
Kalshi Pro Baseball Playoff Matchups data — FAQ
What Kalshi Pro Baseball Playoff Matchups data can I download?
Tick-by-tick trades and Level-2 order-book depth for every contract of the Pro Baseball Playoff Matchups series on Kalshi (4 contract files on the latest day). One bundle = one UTC day of the whole series.
What is the Kalshi series ticker for Pro Baseball Playoff Matchups?
KXMLBMATCHUP — every contract of the series carries this prefix in its ticker (followed by the event date and strike). Files in a day bundle are named by the full contract ticker, so a bundle holds every KXMLBMATCHUP-* contract listed that UTC day.
How far back does the Pro Baseball Playoff Matchups data go?
Coverage runs August 2026 – present — 57 trading days in total.
What format are the Kalshi files in?
One zstd-compressed text file per contract per UTC day, in the same normalized schema as our crypto venues — see the market-data specification; free samples on the downloads page.
Can I get Kalshi Pro Baseball Playoff Matchups data as CSV or Parquet?
Yes — trades export as gzipped CSV or Parquet at no extra cost, with integer microsecond UTC timestamps that load straight into pandas, polars or DuckDB. Kalshi records full order-book depth without a separate BBO stream, so book data ships in the native tick file — the free reader script converts it locally. See the formats overview.
How much does Kalshi Pro Baseball Playoff Matchups historical data cost?
€1 per series-day bundle — every contract of the series for that day — no subscription, no minimum order; buy as a guest in the Data Shop and download immediately. Credit packs lower the effective price and never expire.
Do I need an account or a sales call?
No. Pick the Pro Baseball Playoff Matchups series-days in the Data Shop, pay by card as a guest and download immediately — no subscription, no minimum order, no KYC, no enterprise contract, no sales call. Coding agents buy the same bundles through the MCP server.
How is the Kalshi Pro Baseball Playoff Matchups data captured?
Co-located at the venue, message by message: every Level-2 update and every trade print carries the exchange timestamp and our receive timestamp in integer nanoseconds, an event-id chain makes any gap visible, and one normalized schema across 35+ venues means a parser written for Binance reads these files unchanged. It is the same capture our own high-frequency trading engine runs on — nothing sampled, no top-N cut.
How many Pro Baseball Playoff Matchups contracts trade per day on Kalshi?
On average 5 Pro Baseball Playoff Matchups contracts had at least one trade per UTC day over the last 10 captured days on Kalshi, with about 149.9K order-book level updates recorded per day. A day bundle contains every contract file of the series for that day.
How liquid are Kalshi Pro Baseball Playoff Matchups contracts?
Over the last 10 captured days, the turnover-weighted quoted bid-ask spread was 7.13 ¢ (contracts quote 0..1 = 100 ¢), the mean best-bid/best-ask notional was about $801.28 per side, 70 % of USD turnover was taker-buy. These figures are computed from the recorded Level-2 order books and trade prints — the same data in the day bundles.
What was the most traded Pro Baseball Playoff Matchups contract on 2026-10-13?
KXMLBMATCHUP-26ALCS-TBCLE (MLBMATCHUP · TBCLE) — $1.2K USD turnover over 7 trades on Kalshi. The 2 most traded contracts of the series did 10 trades and $1.2K that UTC day. Open, high, low, close and VWAP per contract are listed on this page; the tick-level data is in the day bundle.
What was the busiest Pro Baseball Playoff Matchups trading day on Kalshi?
2026-09-30, with $32.5K of USD turnover over 1,033 trades across every Pro Baseball Playoff Matchups contract of the day; the busiest full month was Sep 2026 at $70.3K. Since our statistics began on 2026-08-18 the series has recorded 5,489 trades and $136.7K over 57 captured days; the single biggest contract was KXMLBMATCHUP-TB1ST26-NYY (MLBMATCHUP · NYY) on 2026-10-01 with $18.3K. Any of these days is a downloadable bundle.
When do Pro Baseball Playoff Matchups contracts settle?
Contracts listed to settle between 04:00 and 04:59 UTC carried 74 % of the USD turnover of the most traded Pro Baseball Playoff Matchups contracts per day over the newest 30 captured days on Kalshi. The hour-by-hour profile on this page shows the whole day; every contract file carries nanosecond exchange timestamps, so any finer profile can be computed from the bundle.
Which market types does Kalshi list for MLB?
Kalshi lists each market type as its own series — 72 MLB series with 883,314 contracts listed as of 2026-11-02: player & team props 601,750 · total / over-under 90,394 · spread / handicap 30,874 · moneyline / winner 20,954 · period markets 14,547. Pro Baseball Playoff Matchups is one of them; a series-day bundle covers one series, so buy the same day across the sibling series you need in the shop.
Which weekday does Kalshi Pro Baseball Playoff Matchups trade most?
Thursdays — about $3.6K of USD turnover per Thursday and 16 % of the series' turnover over the 10 captured days to 2026-10-13 on Kalshi, summed from every trade print of the series' contracts. The weekday profile on this page shows all seven days; the day bundles carry the full tape behind them.