Padres vs Mets Prediction Market Odds, August 18, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Padres | -1.5 39%32% | O 1 51%51% | 52%52% | 52% Kalshi |
â–¶Mets | +1.5 61%68% | U 1 49%49% | 49%49% | 49% Kalshi |
San Diego is a 51c favorite on Kalshi against New York at 50c, a pick'em board despite the Padres carrying a 67-59 record into Citi Field against a 57-69 Mets team. Polymarket lists only the Mets side at 51c, which implies 49c on San Diego and makes it the cheaper door for a Padres position. The pitching matchup explains the flat price: Robbie Ray owns a 6.00 ERA in two starts since joining the Padres, while Zac Thornton brings a 2.78 ERA and a 1.10 WHIP into his ninth start.
San Diego arrives at Citi Field with a 10-game edge in the standings and a moneyline that ignores it. The Padres (67-59) sit at 51c on Kalshi against a Mets side (57-69) buried 18 games back in the NL East, which is as close to a coin flip as a board gets. Two things flatten the gap: New York has won four straight and took the series opener 2-1 on Monday, and San Diego hands the ball to Robbie Ray, who owns a 6.00 ERA across two starts since the trade. First pitch is 7:10 PM ET on Tuesday, August 18, 2026.
Padres vs Mets Market Context
The Padres vs Mets board carries roughly $6.3K in lifetime volume across Kalshi and Polymarket, with the two moneyline legs holding about $3.9K of it. Kalshi prices San Diego at 51c and New York at 50c, the standard two-sided book with the exchange vig baked into the 101c sum. Polymarket lists only the Mets side at 51c, which implies 49c on San Diego and makes Polymarket the marginally better door for a Padres position. That 2c gap sits on a thin Polymarket book (about $4 of lifetime volume on the leg), so treat it as a liquidity difference rather than a signal about the game.
The overnight tape has been flat. Kalshi's Padres leg opened the session at 51c and has not moved off it, and the Mets leg has held 50c through every snapshot. The one Kalshi line that has moved is the first-inning run market, which climbed from 46c to 51c overnight and now prices a run in the first as a coin flip.
The derivative ladder lives on Polymarket. The run line has San Diego -1.5 at 39c and New York -1.5 at 34c, with the -2.5 rungs at 30c and 25c. The totals ladder prices over 7.5 at 58c, over 8.5 at 49c, and over 9.5 at 39c, which puts the market's implied number squarely on 8.5 runs.
Padres vs Mets Records, Form, and the Standings Stake
San Diego is 67-59 overall and 30-33 on the road, second in the NL West at 7.5 games back. That road split is the number that matters for a pick'em price: the Padres are a .532 team overall and a sub-.500 team away from Petco Park, and this is game two of a three-game set at Citi Field. They have gone 3-2 across their last five, including Monday's 2-1 loss.
New York is 57-69 and 29-34 at home, last in the NL East at 18 games out. The record is bad and the recent form is not. The Mets have won four in a row, taking three from Washington before the 2-1 win over San Diego, and they lead this series 1-0 with two to play. Both clubs are shorthanded. Juan Soto, the Mets home run leader at 21, went on the 10-day injured list on August 15 with a calf strain and is not projected back until September, and Mark Vientos is out with a hand fracture. San Diego is missing arms instead of bats: Nick Pivetta, Joe Musgrove, and Lucas Giolito are all on the injured list, a rotation shortage that is the backdrop to the midseason move for Ray.
Ray vs Thornton: The Padres vs Mets Pitching Matchup
Robbie Ray is 10-7 with a 3.28 ERA over 131.2 innings and 23 starts on the season, but the split since the trade is what the market is pricing. In two starts for San Diego he is 0-1 with a 6.00 ERA, 9.0 innings, 8 walks, and 6 strikeouts, a 1.89 WHIP over that stretch. That is a different pitcher from the one who posted a 3.08 ERA in 21 starts for San Francisco. His walk rate was elevated before the move (65 free passes in 131.2 innings) and it has gotten worse, which is the specific risk in backing San Diego at 51c.
Zac Thornton takes the ball for New York at 3-3 with a 2.78 ERA, a 1.10 WHIP, and 29 strikeouts in 45.1 innings across eight starts. The strikeout rate is modest for that ERA, so the profile leans on contact management and the defense behind him rather than swing-and-miss. Averaging under six innings per start also means the Mets bullpen is in this game early, and that bullpen is down Cionel Perez and Austin Warren.
The supporting cast rounds out the read. New York's staff leader is Nolan McLean at a 3.34 ERA with 162 strikeouts and 9 wins, and Carson Benge leads the lineup at .273 with Soto sidelined. San Diego counters with Manny Machado at 23 home runs and 70 RBI, Fernando Tatis Jr. hitting .279, and Michael King fronting the rotation at a 3.41 ERA. With the Padres chasing a division they trail by 7.5 games and the Mets playing out a lost NL East, the urgency sits entirely on the road team, and the price gives it no credit.
When the Padres vs Mets Market Resolves
The market resolves when this game goes final at Citi Field on Tuesday, August 18, 2026, first pitch 7:10 PM ET. The moneyline pays the winner, the Polymarket run line settles on the final margin, and the totals ladder settles on combined runs. Kalshi's first-inning market settles as soon as the top and bottom of the first are complete. Extra innings count toward the moneyline, the run line, and the total.
Key Padres vs Mets Catalysts
Ray's command: 8 walks in 9.0 innings since the trade is the single biggest variable on the San Diego side.
Thornton's leash: 45.1 innings over eight starts means the Mets bullpen enters early, and it is missing two arms.
Soto's absence: New York's 21-homer leader is out until September, which is already in the 50c price.
Cross-platform pricing: Polymarket's 51c Mets leg implies 49c on San Diego against Kalshi's 51c, the cheaper entry for that side.
The first-inning line: Kalshi's run-in-the-first market moved 46c to 51c overnight, the only Kalshi line on this board that moved at all.
Related Padres vs Mets Markets
The series opener board at Padres vs Mets on August 17 is the direct comparison, and New York won it 2-1. San Diego's season-long stake trades on the NL West winner market, where the Padres sit 7.5 games back, and on the NL pennant market and the World Series market. Every MLB board for the day, including the rest of this series, is listed on the MLB hub.
Resolution Criteria
The moneyline resolves to the team that wins the game at Citi Field on Tuesday, August 18, 2026, with first pitch scheduled for 7:10 PM ET. Each winning contract pays $1 per share and the losing side settles at $0. Polymarket's run line settles on the final margin, so San Diego -1.5 pays only if the Padres win by two runs or more, and the totals ladder settles on combined runs scored by both teams, with over 8.5 paying if the game finishes with nine or more. Kalshi's first-inning market settles yes if either team scores in the top or bottom of the first inning. Extra innings count toward the moneyline, the run line, and the total. Both platforms settle on the official final score once the game is complete. If the game is postponed, the contracts follow the rescheduled game or void per each platform's published rules, and a suspended game settles on the official result when play concludes.
Key Factors
- Robbie Ray command since the trade to San Diego (8 walks in 9.0 innings, 6.00 ERA over two starts)
- Zac Thornton workload limit (45.1 innings across eight starts) and how early the Mets bullpen enters
- Juan Soto out with a calf strain until September, removing the Mets 21-homer leader from the lineup
- Polymarket implying 49c on San Diego versus Kalshi at 51c, the cheaper entry for a Padres position
- Kalshi first-inning run market up from 46c to 51c overnight, the only Kalshi line on this board that moved
- San Diego 30-33 on the road against New York 29-34 at home, the split that flattens a 10-game record gap
What are the current Padres vs Mets odds?
As of August 18, 2026, San Diego is 51c on Kalshi and New York is 50c on Kalshi and 51c on Polymarket, a 50.5c cross-platform average. The board prices the game as a pick'em with no meaningful favorite.
When does the Padres vs Mets market resolve?
It resolves when the game goes final at Citi Field on Tuesday, August 18, 2026. First pitch is scheduled for 7:10 PM ET and the moneyline pays the winning team, extra innings included.
Where can I trade the Padres vs Mets market?
Kalshi carries the moneyline for both teams plus a first-inning run market, and Polymarket carries the Mets moneyline, the -1.5 and -2.5 run lines, and a totals ladder from 7.5 to 9.5. The board holds roughly $6.3K in lifetime volume.
Who is favored in Padres vs Mets?
San Diego by half a cent. The Padres are 51c on Kalshi and the Mets average 50.5c, an implied probability near 50% on each side despite San Diego holding a 67-59 record against New York's 57-69.
What should I watch before the Padres vs Mets market resolves?
Robbie Ray's control, given 8 walks in 9.0 innings since the trade, and the Mets lineup card without Juan Soto, who is out until September with a calf strain. The Polymarket total sits on 8.5 runs at 49c, so an early bullpen call on either side moves that line first.