Mets vs White Sox Prediction Market Odds, August 21, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
Mets | -4.5 — | O 0.5 — | 0%0% | — |
Sox | +4.5 — | U 0.5 — | 100%100% | 100% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
New York Mets | -4.5 — | O 0.5 — | 0%0% | — |
Chicago White Sox | +4.5 — | U 0.5 — | 100%100% | 100% Kalshi |
Chicago is the 57.5c favorite in the Mets vs White Sox market (58c Kalshi, 57c Polymarket) with New York at 43c on both books. The pricing runs against the season records: the White Sox are 66-61 and lead the AL Central, the Mets are 58-70 and sit fifth in the NL East, yet New York arrives 7-3 in its last 10 while Chicago has split its last 10 at 5-5. First pitch is 7:40 PM ET at Rate Field, and the board has traded roughly $9.9K across both platforms.
Chicago White Sox at 57.5c is a home-field and starting-pitcher price, not a record price. The White Sox are 37-25 at Rate Field against a Mets team that is 28-35 on the road, and Sean Burke (7-6, 3.15 ERA) carries more than a full run of ERA advantage over Sean Manaea (4-5, 4.22 ERA). That 14.5c gap between the two moneyline legs is the entire market read on a game between a first-place team with a losing road split and a fifth-place team playing its best baseball in a month.
Mets vs White Sox Market Context
The White Sox are 66-61 and lead the AL Central, and the home split is where their record is built: 37-25 at Rate Field versus 29-36 away from it. Chicago is 5-5 in its last 10, including a series against the Cubs and the opener of the Braves set. The Chicago White Sox hub carries the rest of the club's board, and the division lead is what gives this game standings weight in late August.
New York is 58-70 and fifth in the NL East, but the last two weeks tell a different story than the season line does. The Mets are 7-3 in their last 10, taking three from Washington and two of three from San Diego. The market has not repriced that run into the moneyline: 43c on both Kalshi and Polymarket is the same number the books would put on a road underdog with a 4.22 ERA starter and a 28-35 road record, which is what New York is on paper.
Kalshi and Polymarket sit 1c apart on Chicago (58c versus 57c) and are identical at 43c on New York, so there is no meaningful cross-platform disagreement to work with on the moneyline. The board's liquidity is concentrated there as well: the two moneyline legs hold about $5.6K each of the roughly $9.9K lifetime volume, and the derivative markets are thin by comparison.
The run line prices Chicago at 39.5c to win by two or more (39c Kalshi, 40c Polymarket) and New York at 31c for the same margin, so the market expects a close game rather than a blowout in either direction. The total agrees: Over 7.5 runs trades at 52c, Over 8.5 at 44.5c, and Over 9.5 at 34.5c, which centers the expected score right around eight runs combined. Over 7.5 is the busiest non-moneyline line on the board at about $2.1K in volume.
On the props, Manaea's strikeout ladder is the one with real interest: 6+ strikeouts trades at 55c, 7+ at 41c, and 8+ at 26c. Francisco Lindor sits at 64c for 1+ hits, 40c for 2+ total bases, and 15c for a home run. A run in the first inning is priced at 46.5c (46c Kalshi, 47c Polymarket).
The board carries no moneyline snapshot series yet, so there is no verified open-to-current move to report on Chicago or New York. The earliest captured prices on this game sit on the totals side, where Over 2.5 runs moved from 92c to 97c and the first-five-innings Over 0.5 line jumped from the 56c area to 92c as those markets filled in. Treat 57.5c as the opening read on Chicago rather than the end of a move.
When the Mets vs White Sox Market Resolves
The moneyline resolves to the team that wins the game at Rate Field on August 21, 2026, with first pitch scheduled for 7:40 PM ET. Kalshi and Polymarket settle once the game is official and final. The run line and the total settle on the final score, and the first-five-innings markets settle on the score after the top and bottom of the fifth. A postponement moves settlement to the rescheduled date under each platform's own postponement rules.
Key Mets vs White Sox Catalysts
Starting pitching gap: Burke (3.15 ERA) against Manaea (4.22 ERA) is the single largest input into the 14.5c moneyline spread.
Chicago's home split: 37-25 at Rate Field versus 29-36 on the road is why a 66-61 team prices as a 57.5c favorite here.
New York's form versus its record: 7-3 in the last 10 against a 58-70 season line, with the market siding with the season line.
Total centered near eight: Over 7.5 at 52c and Over 8.5 at 44.5c leave the total split almost exactly between the two lines.
Manaea's strikeout ladder: 6+ at 55c and 7+ at 41c is the tightest prop pricing on the board and the cleanest read on how deep New York expects him to go.
AL Central stakes: Chicago's division lead makes every home game against a non-contender a standings item, and it feeds the AL pennant market.
Related Mets and White Sox Markets
The New York Mets hub tracks the club's full board, and the Mets playoff market prices what a 58-70 record leaves of the season. On the Chicago side, the AL pennant market and the World Series market carry the longer-dated version of the division lead. Every other game on the slate, plus the season-long team markets, sits on the MLB hub.
Resolution Criteria
The moneyline resolves to the team that wins the game between the New York Mets and the Chicago White Sox at Rate Field on August 21, 2026, scheduled for 7:40 PM ET. Each winning contract pays $1 per share and the losing side settles at $0. The run line settles on the final margin (Chicago -1.5 or New York -1.5), and the game total settles on combined runs scored against the stated line (7.5, 8.5, 9.5). First-five-innings markets settle on the score after the bottom of the fifth inning. Kalshi and Polymarket settle once the game is official and final on the scheduled date; if the game is postponed, settlement follows each platform's postponement rules and moves to the rescheduled date rather than voiding.
Key Factors
- Sean Burke (7-6, 3.15 ERA) versus Sean Manaea (4-5, 4.22 ERA) is the main driver of the 14.5c moneyline gap
- Chicago is 37-25 at Rate Field and 29-36 on the road, so home field carries most of the 57.5c price
- New York is 7-3 in its last 10 despite a 58-70 season record, and the market has not repriced that run
- Total centered near eight runs: Over 7.5 at 52c, Over 8.5 at 44.5c, Over 9.5 at 34.5c
- Manaea strikeout ladder at 55c for 6+ and 41c for 7+ is the tightest prop pricing on the board
- Kalshi and Polymarket agree within 1c on the moneyline, so there is no cross-platform pricing gap here
What are the current Mets vs White Sox odds?
As of August 21, 2026, the Chicago White Sox are the 57.5c favorite (58c on Kalshi, 57c on Polymarket) and the New York Mets sit at 43c on both platforms. That implies roughly a 57% chance for Chicago at home.
Who is favored in Mets vs White Sox?
Chicago is favored at 57.5c, an implied probability near 57%. The White Sox are 66-61 and 37-25 at home, and Sean Burke (3.15 ERA) starts against Sean Manaea (4.22 ERA).
Where can I trade the Mets vs White Sox market?
Both Kalshi and Polymarket list this game. The board has traded roughly $9.9K in lifetime volume across the two platforms, with about $5.6K on each moneyline leg.
When does the Mets vs White Sox market resolve?
It resolves when the game goes final at Rate Field on August 21, 2026, with first pitch scheduled for 7:40 PM ET. A postponement moves settlement to the rescheduled date.
What is the run line and total for Mets vs White Sox?
Chicago -1.5 trades at 39.5c and New York -1.5 at 31c. On the total, Over 7.5 runs is 52c, Over 8.5 is 44.5c, and Over 9.5 is 34.5c.
What should I watch before Mets vs White Sox resolves?
Watch whether the market repriced New York's 7-3 stretch closer to first pitch, and whether the total moved off the 52c Over 7.5 line. Manaea's 6+ strikeout prop at 55c is the cleanest signal on how deep the Mets expect him to pitch.