| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Reds | -1.5 42%30% | O 8.5 47%48% | 76%41% | 76% Kalshi |
â–¶Cardinals | +1.5 58%70% | U 8.5 53%52% | 60%60% | 60% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Cincinnati Reds | -1.5 | O 8.5 | 76% Kalshi | |
â–¶St. Louis Cardinals | +1.5 | U 8.5 | 60% Kalshi |
St. Louis is the 60c home favorite in the Reds vs Cardinals series opener at Busch Stadium, with Cincinnati the road underdog at 41c. Kalshi and Polymarket price the moneyline identically, so there is no cross-platform edge on the winner. The Cardinals (52-50) hand the ball to Dustin May (5-7, 4.78 ERA) against the Reds (47-54) and Rhett Lowder (3-7, 5.75 ERA). The live board above carries the current prices; the market resolves when the game goes final on July 24, 2026.
St. Louis enters Friday's opener at 52-50 and sits as the 60c home favorite over a Cincinnati club that is five games under .500 at 47-54. The Cardinals hold the pitching edge on paper plus the home-field discount, and the line has not moved off that read all night. This is a two-book market, roughly $7.5K in combined volume across Kalshi and Polymarket, and the two exchanges agree to the cent on the moneyline.
St. Louis is priced at 60c on both Kalshi and Polymarket, implying about a 60% chance to win the opener, with Cincinnati at 41c (roughly 41% implied). The two exchanges are identical on the winner market, so there is no arbitrage and no better price to shop between books tonight. The run line tells the same story: the Cardinals at -1.5 trade at 42c on both platforms, while the Reds at -1.5 sit near 30c (29c Kalshi, 30c Polymarket). St. Louis is favored to win, but the 42c run line prices a multi-run margin closer to a coin flip than a lock.
The total is anchored around 8.5 runs. Over 8.5 trades at 48c (47c Kalshi, 49c Polymarket) and Over 7.5 at roughly 56.5c, which places the fair number between 8 and 8.5. That is a modest total, consistent with two starters carrying ERAs near or above 4.78. The only real cross-platform gap on the board sits in the totals, where the Over 8.5 splits 47c Kalshi against 49c Polymarket, a 2c difference not worth chasing.
On movement, the favorite has held. St. Louis opened the overnight window at 60c and stayed in a tight 60c to 61c band across every snapshot, while Cincinnati was flat at 41c on both Kalshi and Polymarket. No steam, no reversal. The market set its number early and has defended it into game day.
The starting pitching explains the 60c to 41c split. St. Louis sends right-hander Dustin May, who is 5-7 with a 4.78 ERA, while Cincinnati counters with right-hander Rhett Lowder at 3-7 and a 5.75 ERA. Neither line is dominant, but May's ERA is nearly a full run better, and he throws at home in front of a St. Louis Cardinals side that is 26-27 at Busch Stadium. Cincinnati is 25-26 on the road and carries the tougher assignment on the mound. That ERA gap, plus home field, is the entire case for the Cardinals being a 60c favorite rather than a pick-em.
The Reds vs Cardinals market resolves on the result of the game scheduled for July 24, 2026, with first pitch set for 8:15 PM ET at Busch Stadium in St. Louis. The moneyline pays the team that wins the game outright. The run line settles on whether the chosen team covers the 1.5-run margin, and the total settles on the combined final run count against the posted number. All contracts settle once the game is official on the platforms; a postponement or suspension pushes settlement to the completion date or voids per each platform's rules.
Starting pitching: Dustin May (4.78 ERA) holds a near full-run edge over Rhett Lowder (5.75 ERA), the core reason St. Louis is the 60c favorite.
Home field: The Cardinals are 26-27 at Busch Stadium, while the Reds are 25-26 on the road in a near-even travel split.
Standings stake: St. Louis (52-50) is chasing a winning record; Cincinnati (47-54) sits five games under .500 and running out of runway.
Run line value: The Cardinals -1.5 at 42c prices a multi-run win close to a coin flip, the spot where the favorite's price is least certain.
Total read: Over 8.5 at 48c frames a modest 8-to-8.5-run game, matched to two mid-4s-to-high-5s ERA starters.
Cross-platform: Kalshi and Polymarket agree to the cent on the moneyline, so there is no book to shop; the lone 2c gap sits on the Over 8.5 total.
Track the Cincinnati Reds and St. Louis team pages for their full-season markets, follow the MLB board for the rest of the day's slate, or browse the wider sports markets hub for cross-league prices.
The Reds vs Cardinals market resolves on the final result of the game scheduled for July 24, 2026 at Busch Stadium in St. Louis, with first pitch at 8:15 PM ET. The moneyline pays the team that wins the game outright at $1 per share, with the losing side settling at $0. The run line settles on whether the selected team covers the 1.5-run margin, and the total settles on the combined final score against the posted line. Markets settle once the game is official on Kalshi and Polymarket. If the game is postponed past the resolution window, suspended, or shortened, settlement follows each platform's official rules for delayed or voided games.
As of July 24, 2026, St. Louis is the 60c home favorite (60c on Kalshi and Polymarket) and Cincinnati is the road underdog at 41c. The prices imply about a 60% Cardinals win probability.
The St. Louis Cardinals are favored at 60c, an implied win probability near 60%, behind starter Dustin May (4.78 ERA) at home against the Reds and Rhett Lowder (5.75 ERA).
The game trades on both Kalshi and Polymarket, which price the moneyline identically at 60c Cardinals and 41c Reds as of July 24, 2026. The run line and total are listed on both books.
The Cardinals -1.5 run line trades at 42c and the Reds -1.5 near 30c. The total is anchored around 8.5 runs, with Over 8.5 at 48c as of July 24, 2026.
It resolves once the July 24, 2026 game at Busch Stadium goes final, first pitch 8:15 PM ET. The moneyline pays the winner, and the run line and total settle on the final score.
Watch for any late scratch of Dustin May or Rhett Lowder and the posted lineups, since the 60c Cardinals price leans on May's ERA edge. The favorite held a 60c to 61c band overnight, so a move off it before first pitch on July 24, 2026 would signal news.