Cardinals vs Reds Prediction Market Odds, August 19, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
▶Cardinals | — | O 1 48%49% | 44%44% | 44% Kalshi |
▶Reds | — | U 1 52%51% | 57%56% | 57% Kalshi |
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Cincinnati is the 56.5c favorite over St. Louis at 44c on the cross-platform average for the August 19, 2026 series finale at Great American Ball Park, and the pitching matchup is why: Chase Burns (14-2, 2.47 ERA) starts against Matthew Liberatore (5-10, 5.07 ERA). The records run the other way, with the Cardinals at 65-62 and the Reds at 60-66. Kalshi (57c) and Polymarket (56c) are within a cent of each other on the favorite and identical at 44c on the dog, so there is no cross-platform disagreement to read into. The live board above carries the current prices.
St. Louis arrives at Great American Ball Park with the better record and the worse starting pitcher, and the prediction market has decided the pitcher matters more. The Cardinals are 65-62 overall and 33-28 on the road. The Reds are 60-66 and 31-35 at home. Cincinnati is still the favorite on both exchanges, because Chase Burns (14-2, 2.47 ERA) takes the ball against Matthew Liberatore (5-10, 5.07 ERA). The board carries roughly $5.4K in lifetime volume across a two-sided moneyline and a first-inning run market. First pitch is 6:40 PM ET on Wednesday, August 19, 2026.
Cardinals vs Reds Market Context
The Cardinals vs Reds moneyline prices Cincinnati at 56.5c on the cross-platform average as of the morning of August 19, 2026, with Kalshi at 57c and Polymarket at 56c. St. Louis sits at 44c on both books. A one-cent gap on the favorite and an exact match on the underdog is about as tight as this board gets, and it says the two exchanges are reading the same pitching matchup the same way. Kalshi has ticked Cincinnati from 56c to 57c since the market opened overnight while Polymarket has held flat, so the movement to this point is a single cent toward the home side rather than a directional repricing.
Volume is skewed toward the team the market does not favor. The St. Louis moneyline leg has drawn roughly $2.5K in lifetime volume against about $1.8K on the Cincinnati side, and the first-inning run market has added another $1.1K. That is a small board by MLB standards. Thin books move on small orders, so one sized trade will do more to the printed price here than any pregame news item.
The series reaches its finale with St. Louis ahead. The Cardinals won 3-0 on August 18 and split the August 17 doubleheader, taking the opener 2-1 before dropping the nightcap 6-5 in ten innings. Three of those four games were decided by one run or by shutout, which fits two offenses that do not score. Cincinnati hits .227 as a team, last in the majors, and has scored 509 runs (24th). St. Louis hits .241 (20th) and has scored 555 (17th). Neither lineup has been the reason to bet either side this season.
The Pitching Matchup Driving Cardinals vs Reds Odds
Chase Burns is the entire case for Cincinnati at 56.5c. He is 14-2 with a 2.47 ERA, fifth in the majors in earned run average and third in wins, and he is doing it in front of a staff that ranks 24th with a 4.49 team ERA. Strip Burns out of the Reds rotation and this is a 60-66 team with the worst batting average in baseball. Start him, and the market pays up 12 cents over a coin flip.
Matthew Liberatore is the reason the number is not higher. He is 5-10 with a 5.07 ERA, and the road team is asking a below-average starter to keep a game close in a park that plays small. The counterweight is everything behind him: the Cardinals staff carries a 4.03 team ERA (12th), the bullpen has converted 36 saves (seventh), and the defense has committed 54 errors, the sixth-fewest in the majors. That combination is why the underdog price sits at 44c rather than the high 30s. The market is pricing Burns versus the St. Louis pitching structure, not Burns versus Liberatore alone.
The implied probabilities are 56.5% for Cincinnati and 44% for St. Louis. The first-inning market prices a run scoring in the top or bottom of the first at 48.5c on the average (48c Kalshi, 49c Polymarket), a read that lines up with a Burns start and a Cincinnati lineup hitting .227. There is no spread or total posted on this board, so the moneyline and the first-inning question are the only two ways the game trades on either exchange today. If you want season-length exposure to either club instead, the Cardinals playoff market prices the same roster over a longer horizon.
When the Cardinals vs Reds Market Resolves
The moneyline resolves to the team that wins the game at Great American Ball Park on Wednesday, August 19, 2026, scheduled for 6:40 PM ET. Each winning team contract pays $1 per share and the losing side settles at $0, with the result taken from the official MLB final score. Extra innings count toward the final result. If the game is postponed and replayed on a later date, or suspended and completed later, Kalshi and Polymarket each apply their own rescheduling and void rules, and a game that is not played at all voids rather than paying out. The first-inning market settles on whether either team scores in the first inning of that same game.
Key Cardinals vs Reds Catalysts
Burns workload: Chase Burns at 14-2 with a 2.47 ERA is the single largest input into the 56.5c price, and any early exit hands the game to a 4.49-ERA Cincinnati bullpen.
Liberatore leash: Matthew Liberatore carries a 5.07 ERA into a small park, and how fast St. Louis goes to a bullpen that has converted 36 saves decides whether 44c was cheap.
Cincinnati offense: the Reds hit .227 as a team, worst in the majors, and have been shut out already in this series.
Cross-platform read: Kalshi at 57c and Polymarket at 56c on the Reds is a one-cent gap, so there is no meaningful pricing disagreement to lean on today.
Book depth: with roughly $5.4K in lifetime volume across the whole board, the printed price is more sensitive to order flow than to information.
Related Cardinals vs Reds Markets
The season-long context for this game lives on the team pages: the St. Louis Cardinals hub tracks every Cardinals market across both exchanges, and the Cincinnati Reds hub does the same for the home side. For the standings stakes, the NL Central division market and the Reds playoff market both price how much a mid-August game between a 65-62 team and a 60-66 team actually moves. The Cardinals season win total is the cleanest way to trade the St. Louis stretch run, and the full slate of games trading today sits on the MLB hub.
Resolution Criteria
Resolves to the team that wins the game between the St. Louis Cardinals and the Cincinnati Reds at Great American Ball Park on Wednesday, August 19, 2026, scheduled for 6:40 PM ET. The winning team contract pays $1 per share and the losing team contract settles at $0, with the official MLB final score as the source of truth. Extra innings count toward that final. If the game is postponed to a later date, suspended and resumed, or shortened by weather after becoming an official game, Kalshi and Polymarket each apply their own posted rescheduling rules, and a contest that is never played voids rather than paying either side. The separate first-inning contract settles yes if either team scores in the first inning of that same game.
Key Factors
- Chase Burns start for Cincinnati (14-2, 2.47 ERA, fifth in the majors) is the largest single input into the 56.5c price
- Matthew Liberatore for St. Louis at 5-10, 5.07 ERA, and how early the Cardinals go to a bullpen with 36 saves
- Cincinnati offense hitting .227 as a team, last in the majors, after being shut out 3-0 on August 18
- Kalshi 57c versus Polymarket 56c on the Reds is a one-cent gap, so the books are in agreement
- Board depth of roughly $5.4K lifetime volume makes the printed price sensitive to single orders
- St. Louis road form at 33-28 against a Cincinnati home mark of 31-35
What are the current Cardinals vs Reds odds?
As of the morning of August 19, 2026, Cincinnati is 56.5c on the cross-platform average (57c Kalshi, 56c Polymarket) and St. Louis is 44c on both books. That implies a 56.5% chance the Reds win the series finale.
Who is favored in Cardinals vs Reds on August 19, 2026?
The Cincinnati Reds, despite a 60-66 record against the Cardinals at 65-62. The favorite tag comes from the starting pitchers: Chase Burns is 14-2 with a 2.47 ERA, while Matthew Liberatore is 5-10 with a 5.07 ERA.
Where can I trade the Cardinals vs Reds market?
Both Kalshi and Polymarket list this game. Kalshi runs it under its MLB game series and Polymarket lists it as an event market, with roughly $5.4K of lifetime volume across the moneyline and the first-inning contract.
When does the Cardinals vs Reds market resolve?
It resolves after the final out at Great American Ball Park on Wednesday, August 19, 2026, with first pitch scheduled for 6:40 PM ET. Settlement follows the official MLB final score, extra innings included.
Is there a spread or total on this game?
No. This board posts a two-sided moneyline plus a first-inning run market priced at 48.5c on the average (48c Kalshi, 49c Polymarket). Watch whether Burns holds his 2.47 ERA form, since an early exit shifts the game to a Cincinnati staff carrying a 4.49 team ERA.