MLS & US Soccer Prediction Market Data
Tick-by-tick trades and L2 order-book depth for 35 MLS & US Soccer series on Kalshi & Polymarket — MLS games, spreads, totals and correct scores, Leagues Cup, USL Championship, NWSL. 3,611 series-days covering May 2025 – present; 2.5M trades · $84.3M turnover over the last 30 captured days. Every contract captured co-located with nanosecond venue and receive timestamps — sold as day bundles, €1 per day, bought as a guest with instant download.
MLS & US Soccer on Kalshi & Polymarket
MLS, Leagues Cup, USL Championship and NWSL markets.
Every series below is archived at full feed resolution — each contract file carries every trade print (price, size, side) and Level-2 order-book updates in one normalized, zstd-compressed schema. A series-day bundle holds all contracts of the series for one UTC day.
Most traded MLS & US Soccer series (last 30 days)
Ranked by USD turnover from our own daily statistics — the series a market maker or bot builder should start with.
| # | Series | Venue | Trades (30d) | Turnover (30d) | Days | |
|---|---|---|---|---|---|---|
| 1 | Major League Soccer Game | Kalshi | 1,110,718 | $34.4M | 30 | Buy days |
| 2 | MLS Soccer | Polymarket | 147,108 | $13.8M | 30 | Buy days |
| 3 | MLS Total | Kalshi | 244,074 | $11.4M | 30 | Buy days |
| 4 | Leagues Cup Game | Kalshi | 106,221 | $4.6M | 15 | Buy days |
| 5 | NWSL Game | Kalshi | 212,367 | $2.8M | 30 | Buy days |
| 6 | Point Total (KXLEAGUESCUPTOTAL) | Kalshi | 69,557 | $2.6M | 15 | Buy days |
| 7 | USL Championship Game | Kalshi | 178,532 | $2.4M | 30 | Buy days |
| 8 | Leagues Cup | Polymarket | 28,064 | $1.9M | 30 | Buy days |
| 9 | MLS BTTS | Kalshi | 44,169 | $1.7M | 30 | Buy days |
| 10 | 1st Half Total (KXMLS1HTOTAL) | Kalshi | 43,692 | $1.6M | 24 | Buy days |
Trades and USD turnover summed over every contract of the series, from the recorded tick data; 30 days to 2026-09-22. Series without statistics in the window are omitted.
MLS & US Soccer activity per venue
| Venue | Series | With stats | Trades (30d) | Turnover (30d) |
|---|---|---|---|---|
| Kalshi | 31 | 31 | 2,344,375 | $67.9M |
| Polymarket | 4 | 4 | 203,899 | $16.4M |
30 days to 2026-09-22, from our own daily statistics per contract.
MLS & US Soccer — development since capture
8,168,952 trades and $290.9M of USD turnover across 35 series since 2026-07-08; busiest single series-day 2026-07-23 with $11.3M, biggest contract KXLEAGUESCUPGAME-26AUG09AMEPOR-AME (2026-08-10, $2.2M).
| Month | Series active | Days | Trades | Turnover (USD) | Avg / day | Contracts traded | L2 updates | vs previous month |
|---|---|---|---|---|---|---|---|---|
| Sep 2026 (month to date) | 35 | 22 | 1,844,334 | $60.1M | $2.7M | 20,803 | 561.4M | — |
| Aug 2026 | 35 | 31 | 5,278,629 | $185.6M | $6.0M | 32,598 | 834.5M | — |
| Jul 2026 | 20 | 24 | 1,045,989 | $45.2M | $1.9M | — | — | — |
MLS & US Soccer series — 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.
MLS & US Soccer — turnover by weekday
Sundays are the busiest day at about $9.4M of USD turnover, averaged over the captured days of the last 30.
| Weekday (UTC) | Avg turnover / day | USD | Avg trades | Days |
|---|---|---|---|---|
| Monday | $1.6M | 49.5K | 5 | |
| Tuesday | $145.6K | 5.2K | 5 | |
| Wednesday | $1.4M | 34.4K | 4 | |
| Thursday | $4.7M | 149.5K | 4 | |
| Friday | $442.6K | 10.5K | 4 | |
| Saturday | $3.1M | 86.8K | 4 | |
| Sunday | $9.4M | 287.5K | 4 |
MLS & US Soccer series — 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 —.
Rising MLS & US Soccer series — 30 days vs the 30 before
| # | Series | Venue | Turnover (30d) | Prior 30d | Growth (avg / day) | Trades (30d) |
|---|---|---|---|---|---|---|
| 1 | MLS Western Conference winner? (KXMLSEAST) | Kalshi | $12.4K | $3.6K | +74.3 % | 1,378 |
| 2 | Spread (KXUSLSPREAD) | Kalshi | $60.2K | $30.4K | +6.0 % | 4,455 |
| 3 | 1st Half Total (KXMLS1HTOTAL) | Kalshi | $1.6M | $1.6M | −10.4 % | 43,692 |
| 4 | MLS BTTS | Kalshi | $1.7M | $989.7K | −14.5 % | 44,169 |
| 5 | 1st Half Winner (KXMLS1H) | Kalshi | $1.2M | $1.4M | −19.2 % | 40,582 |
Growth of average USD turnover per captured day, the 30 days to 2026-09-22 against the 30 days before; series need ≥ 10 captured days in both windows and ≥ $10K of turnover in the current one. From our own daily statistics.
MLS & US Soccer prediction markets — trades and turnover per day
Every captured UTC day of the last 30, summed over the 35 MLS & US Soccer series — how much these markets trade day by day, from our own tick capture.
| UTC day | Series with stats | Contracts traded | Trades | Turnover | Buy share | L2 updates |
|---|---|---|---|---|---|---|
| 2026-09-22 | 24 | 352 | 2,909 | $41.9K | 78 % | 12.3M |
| 2026-09-21 | 23 | 542 | 61,047 | $1.6M | 61 % | 16.0M |
| 2026-09-20 | 24 | 2,069 | 268,362 | $9.1M | 64 % | 40.2M |
| 2026-09-19 | 24 | 1,586 | 60,710 | $2.2M | 65 % | 19.8M |
| 2026-09-18 | 24 | 718 | 9,738 | $512.7K | 79 % | 12.0M |
| 2026-09-17 | 24 | 428 | 36,773 | $631.5K | 61 % | 16.4M |
| 2026-09-16 | 21 | 356 | 9,212 | $170.3K | 70 % | 11.9M |
| 2026-09-15 | 18 | 329 | 3,805 | $71.0K | 77 % | 11.4M |
| 2026-09-14 | 24 | 492 | 64,992 | $2.7M | 60 % | 15.1M |
| 2026-09-13 | 24 | 1,923 | 266,135 | $9.8M | 65 % | 40.6M |
| 2026-09-12 | 24 | 1,449 | 62,259 | $1.9M | 69 % | 27.3M |
| 2026-09-11 | 24 | 651 | 8,889 | $136.6K | 79 % | 19.6M |
| 2026-09-10 | 25 | 1,731 | 335,085 | $11.4M | 63 % | 41.6M |
| 2026-09-09 | 26 | 1,377 | 38,808 | $2.3M | 75 % | 30.9M |
| 2026-09-08 | 24 | 473 | 2,797 | $52.0K | 75 % | 20.1M |
| 2026-09-07 | 32 | 494 | 56,781 | $1.5M | 62 % | 23.8M |
| 2026-09-06 | 34 | 2,005 | 302,443 | $8.1M | 63 % | 60.9M |
| 2026-09-05 | 34 | 1,658 | 108,939 | $3.6M | 69 % | 46.9M |
| 2026-09-04 | 34 | 695 | 17,074 | $983.8K | 85 % | 31.9M |
| 2026-09-03 | 34 | 585 | 107,405 | $2.7M | 65 % | 29.4M |
| 2026-09-02 | 32 | 459 | 12,544 | $472.3K | 84 % | 16.7M |
| 2026-09-01 | 29 | 431 | 7,627 | $188.4K | 78 % | 16.5M |
| 2026-08-31 | 28 | 444 | 27,811 | $1.2M | 53 % | 13.1M |
| 2026-08-30 | 29 | 2,619 | 313,127 | $10.5M | 66 % | 55.7M |
| 2026-08-29 | 29 | 1,772 | 115,438 | $4.5M | 74 % | 34.8M |
| 2026-08-28 | 29 | 881 | 6,386 | $137.2K | 84 % | 12.4M |
| 2026-08-27 | 34 | 851 | 118,708 | $4.1M | 62 % | 20.7M |
| 2026-08-26 | 28 | 724 | 76,842 | $2.5M | 63 % | 16.7M |
| 2026-08-25 | 28 | 660 | 8,717 | $374.7K | 71 % | 16.5M |
| 2026-08-24 | 32 | 622 | 36,911 | $862.1K | 66 % | 18.2M |
Per UTC day, summed over every MLS & US Soccer series that has statistics for that day, from every trade print of every contract in our tick archive. Trades and USD turnover are exact; contracts traded, buy share and L2 (order-book) updates exist for days captured with the extended statistics — earlier days show —.
Most traded MLS & US Soccer contracts on 2026-09-22
The single event contracts with the most USD turnover on the newest captured day — with open and close price and the outcome implied by the last print.
| Contract | Series | Venue | Open → Close | Implied outcome | Trades | Turnover | |
|---|---|---|---|---|---|---|---|
| KXMLSGAME-26SEP27CLBMIA-MIA | Major League Soccer Game | Kalshi | 0.450 → 0.440 | open | 140 | $5.5K | buy file → |
| KXMLSGAME-26SEP23SEARSL-SEA | Major League Soccer Game | Kalshi | 0.510 → 0.520 | open | 335 | $4.8K | buy file → |
| mls-sea-rsl-2026-04-12-sea | MLS Soccer | Polymarket | 0.500 → 0.520 | open | 63 | $3.1K | buy file → |
| KXMLSTOTAL-26SEP23SEARSL-3 | MLS Total | Kalshi | 0.590 → 0.610 | open | 75 | $2.5K | buy file → |
| mls-nas-tor-2026-09-26-nas | MLS Soccer | Polymarket | 0.660 → 0.670 | open | 42 | $2.5K | buy file → |
| KXMLSCUP-26-VAN | MLS Cup champion | Kalshi | 0.240 → 0.230 | open | 16 | $2.1K | buy file → |
| KXMLSGAME-26SEP26NSHTOR-NSH | Major League Soccer Game | Kalshi | 0.670 → 0.660 | open | 31 | $1.3K | buy file → |
| KXMLSGAME-26SEP23SEARSL-TIE | Major League Soccer Game | Kalshi | 0.250 → 0.250 | open | 85 | $996.09 | buy file → |
| KXMLSGAME-26SEP23SEARSL-RSL | Major League Soccer Game | Kalshi | 0.260 → 0.240 | open | 258 | $993.92 | buy file → |
| KXMLSTOTAL-26SEP26NSHTOR-1 | MLS Total | Kalshi | 0.960 → 0.960 | open | 2 | $908.76 | buy file → |
Single contracts ranked by USD turnover on 2026-09-22 (UTC), from every trade print in our tick archive. Prices quote 0..1; the implied outcome reads the last print of the day (≥ 0.97 Yes/Up, ≤ 0.03 No/Down) — venues publish the official result. Each contract’s day file is sold individually, the whole series day as a bundle.
Biggest MLS & US Soccer moves in the last 24 hours
From the live prediction-movers snapshot (contracts of this topic's series only, settled markets filtered). Intraday — not part of the archived dataset.
| Contract | Venue | Price 24h ago → now | Δ | 24h turnover |
|---|---|---|---|---|
| mls-sea-rsl-2026-04-12-sea | Polymarket | 0.51 → 0.55 | +0.04 | $13.7K |
| KXMLSGAME-26SEP23SEARSL-SEA | Kalshi | 0.52 → 0.55 | +0.03 | $12.1K |
Live contracts ranked by absolute 24-hour price change (contracts quote 0..1; settled or near-settled contracts excluded). Snapshot 2026-09-23 16:18 UTC. Full list in the prediction movers.
Kalshi MLS & US Soccer series
Largest archive first. Each series page lists its exact coverage, day count and recent days; day bundles are bought in the shop calendar.
| Series | Venue | Interval | Days | Coverage | Size | Price/day | |
|---|---|---|---|---|---|---|---|
| Major League Soccer Game | Kalshi | event | 161 | February 2026 – present | 5.03 GB | €1 | Buy days |
| MLS Total | Kalshi | event | 152 | March 2026 – present | 2.81 GB | €1 | Buy days |
| USL Championship Game | Kalshi | event | 184 | March 2026 – present | 2.45 GB | €1 | Buy days |
| NWSL Game | Kalshi | event | 145 | March 2026 – present | 1.92 GB | €1 | Buy days |
| Leagues Cup Game | Kalshi | event | 40 | July 2026 – September 2026 | 1.32 GB | €1 | Buy days |
| MLS Spread | Kalshi | event | 152 | March 2026 – present | 1.07 GB | €1 | Buy days |
| MLS Cup champion | Kalshi | event | 203 | March 2026 – present | 724 MB | €1 | Buy days |
| Correct Score (KXMLSSCORE) | Kalshi | event | 58 | July 2026 – present | 710 MB | €1 | Buy days |
| Point Total (KXLEAGUESCUPTOTAL) | Kalshi | event | 37 | July 2026 – September 2026 | 616 MB | €1 | Buy days |
| Point Total (KXUSLTOTAL) | Kalshi | event | 67 | July 2026 – present | 505 MB | €1 | Buy days |
| MLS BTTS | Kalshi | event | 152 | March 2026 – present | 467 MB | €1 | Buy days |
| Correct Score (KXLEAGUESCUPSCORE) | Kalshi | event | 28 | July 2026 – September 2026 | 451 MB | €1 | Buy days |
| Team Total (KXLEAGUESCUPTEAMTOTAL) | Kalshi | event | 28 | July 2026 – September 2026 | 407 MB | €1 | Buy days |
| Team Total (KXMLSTEAMTOTAL) | Kalshi | event | 55 | July 2026 – present | 403 MB | €1 | Buy days |
| Spread (KXLEAGUESCUPSPREAD) | Kalshi | event | 37 | July 2026 – September 2026 | 360 MB | €1 | Buy days |
| 1st Half Winner (KXMLS1H) | Kalshi | event | 55 | July 2026 – present | 312 MB | €1 | Buy days |
| 1st Half Total (KXMLS1HTOTAL) | Kalshi | event | 55 | July 2026 – present | 299 MB | €1 | Buy days |
| Canadian Premier League | Kalshi | event | 136 | April 2026 – present | 272 MB | €1 | Buy days |
| Spread (KXUSLSPREAD) | Kalshi | event | 67 | July 2026 – present | 267 MB | €1 | Buy days |
| 1st Half Winner (KXLEAGUESCUP1H) | Kalshi | event | 28 | July 2026 – September 2026 | 192 MB | €1 | Buy days |
| 1st Half Total (KXLEAGUESCUP1HTOTAL) | Kalshi | event | 28 | July 2026 – September 2026 | 165 MB | €1 | Buy days |
| MLS Western Conference winner? (KXMLSEAST) | Kalshi | annual | 203 | March 2026 – present | 139 MB | €1 | Buy days |
| College Soccer Game | Kalshi | event | 15 | August 2026 – September 2026 | 132 MB | €1 | Buy days |
| First Team to Score | Kalshi | event | 55 | July 2026 – present | 126 MB | €1 | Buy days |
| 1st Half Correct Score (KXMLS1HSCORE) | Kalshi | event | 25 | August 2026 – present | 102 MB | €1 | Buy days |
| USL Cup Game | Kalshi | event | 54 | May 2026 – present | 98.7 MB | €1 | Buy days |
| First Team to Score (KXLEAGUESCUPFTTS) | Kalshi | event | 28 | July 2026 – September 2026 | 95.6 MB | €1 | Buy days |
| MLS Western Conference winner? (KXMLSWEST) | Kalshi | annual | 203 | March 2026 – present | 74.9 MB | €1 | Buy days |
| MLS Transfers | Kalshi | event | 148 | April 2026 – present | 21.0 MB | €1 | Buy days |
| NWSL Champion | Kalshi | annual | 136 | May 2026 – present | 14.5 MB | €1 | Buy days |
| USL Championship | Kalshi | event | 195 | March 2026 – present | 13.2 MB | €1 | Buy days |
Polymarket MLS & US Soccer series
Largest archive first. Each series page lists its exact coverage, day count and recent days; day bundles are bought in the shop calendar.
| Series | Venue | Interval | Days | Coverage | Size | Price/day | |
|---|---|---|---|---|---|---|---|
| MLS Soccer | Polymarket | event | 386 | July 2025 – present | 46.5 GB | €1 | Buy days |
| NWSL Soccer | Polymarket | event | 163 | March 2026 – present | 13.5 GB | €1 | Buy days |
| Leagues Cup | Polymarket | event | 70 | May 2025 – present | 7.50 GB | €1 | Buy days |
| USL Championship | Polymarket | event | 62 | July 2026 – present | 3.76 GB | €1 | Buy days |
Why buy MLS & US Soccer prediction-market 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.
MLS & US Soccer prediction-market data — FAQ
Does Kalshi have MLS markets?
Yes — MLS games, spreads, totals, team totals, first-half lines and correct scores, plus Leagues Cup games, spreads, totals and first team to score, and USL totals. Polymarket MLS, Leagues Cup, USL Championship and NWSL each form a family.
How is MLS prediction-market data sold?
One purchase covers every contract of the series for one UTC day — every trade print and the complete Level-2 book per contract, captured co-located with nanosecond timestamps — €1 per series-day, bought as a guest with instant download.
How far back does the MLS & US Soccer data go?
Coverage runs May 2025 – present — 3,611 series-days across 35 series on Kalshi & Polymarket. Each series page lists its exact span.
Can I get MLS & US Soccer prediction-market 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. Both venues record 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 MLS & US Soccer prediction-market data cost?
€1 per series-day bundle — every contract of the series for that UTC day — no subscription, no minimum order. Pick days in the shop calendar, pay as a guest, download immediately.
Do I need an account or a sales call?
No. Pick the MLS & US Soccer 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 MLS & US Soccer 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.
What was the busiest MLS & US Soccer trading day?
2026-07-23 — $11.3M of USD turnover over 244,615 trades in a single series-day. Since our statistics began on 2026-07-08, 35 MLS & US Soccer series recorded 8,168,952 trades and $290.9M in total; the biggest single contract was KXLEAGUESCUPGAME-26AUG09AMEPOR-AME on 2026-08-10 at $2.2M. Sundays are the busiest weekday at about $9.4M per day.