| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Cardinals | +1.5 55%56% | O 7.5 56%55% | 20%20% | 20% Kalshi |
â–¶Cubs | -1.5 45%44% | U 7.5 44%45% | 32%32% | 32% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶St. Louis Cardinals | +1.5 | O 7.5 | 20% Kalshi | |
â–¶Chicago Cubs | -1.5 | U 7.5 | 32% Kalshi |
Chicago is the 63c favorite for the series opener at Wrigley Field on August 14, 2026, and the two books agree to the cent: Kalshi and Polymarket both print the Cubs at 63c and the Cardinals at 38c on the moneyline. The gap is earned. Chicago is 71-51 and 8-2 across its last 10 games, 3.5 games behind Milwaukee in the NL Central, and starts Clay Holmes (4-5, 2.86 ERA) against a St. Louis club at 61-60 that counters with Matthew Liberatore (5-9, 5.15 ERA). Chicago has climbed from 57c on August 13 to 63c heading into first pitch, a six-cent move toward the home side.
The Cubs open a three-game set with St. Louis at Wrigley Field as a 63c favorite, and this is one of the rare game boards where the two venues have nothing to argue about. Kalshi and Polymarket both post Chicago at 63c and the Cardinals at 38c, an implied 63% for the home side. The board carries roughly $20.8K in tracked volume across moneyline, run line, total, team totals, and first-inning markets, with the two moneyline contracts alone holding about $12.0K of it. First pitch is 1:20 p.m. CT.
Chicago enters at 71-51 overall and 35-24 at Wrigley, 3.5 games behind Milwaukee (74-47) in the NL Central and 8-2 over its last 10 games. St. Louis is 61-60, 29-26 on the road, and 13 games back in the same division, which puts the two clubs on opposite sides of the same race: the Cubs are chasing a division title, the Cardinals are playing for a wild card path that gets narrower every series.
The pitching matchup is why the number sits at 63c rather than the mid-50s. Clay Holmes (4-5, 2.86 ERA) is the most efficient arm in this game by a wide margin, and Matthew Liberatore (5-9, 5.15 ERA) carries an ERA more than two full runs higher. A 2.3-run ERA gap between probable starters is worth several cents on a baseball moneyline, and the market has priced it: Chicago sat at 57c on August 13 and moved up to 63c, a six-cent gain toward the home side. The intraday series backs that direction, with the Cubs contract ticking from 62c to 63c inside the most recent snapshot window while the Cardinals slid from 39c to 38c.
The lineups tilt the same way. Pete Crow-Armstrong leads Chicago with a .281 average, 27 home runs, and 73 RBIs, the only bat on either roster clearing 25 homers. St. Louis answers with Alec Burleson at .287 and a team-leading 84 RBIs, plus Jordan Walker at 23 home runs, so the Cardinals are not short of production, they are short of a starter who can hold a Wrigley lineup down. St. Louis is 7-3 over its last 10 games, which is the strongest argument for the 38c side and the reason this is a 63c favorite rather than a 70c one.
The run line tells the same story with less conviction. Chicago at -1.5 prices at 43c on both books, and Chicago at -2.5 drops to 32c, so the market gives the Cubs a better than even chance to win but only a coin-flip chance to win comfortably. St. Louis at -1.5 sits at 27c. That spread structure is typical of a game decided by starting pitching rather than by a lineup gap, and it is consistent with the moneyline: a favorite that wins often and blows teams out rarely.
The total is set around eight runs. Over 8.5 trades at 45c and over 7.5 at 55.5c, which brackets the true number just under 8.5, and over 9.5 falls to 34.5c. Team totals split predictably, with Chicago over 3.5 runs at 65c against St. Louis over 2.5 runs at 63c. The run in the first inning market prices at 47.5c (47c Kalshi, 48c Polymarket), a near coin flip that reflects two starters who both work efficiently early.
The only meaningful cross-platform disagreement on this board sits in the alt ladder, not the main number. The first five innings over 2.5 runs line shows 75c on Kalshi against 65c on Polymarket, a 10c difference on a thin derivative market where the two books are pricing off different assumptions about a short-inning sample. Every headline market on the board, moneyline, run line, and full-game total, prices inside a single cent between venues. For the wider MLB board, that level of agreement is the exception rather than the rule.
The game market resolves on the final score of the August 14, 2026 game at Wrigley Field, first pitch 1:20 p.m. CT. The moneyline pays out on the team that wins the game, the run line settles on the final margin, and the total and team totals settle on runs scored across the official game. Both Kalshi and Polymarket settle after the game is declared final, typically within hours of the last out.
Starting pitcher gap: Clay Holmes at a 2.86 ERA against Matthew Liberatore at 5.15 is the single largest input into the 63c price.
Division stakes: Chicago at 71-51 sits 3.5 games behind Milwaukee at 74-47, so every home win against a sub .500 division opponent carries NL Central weight.
Form convergence: the Cubs are 8-2 in their last 10 games and the Cardinals are 7-3, which is why this is a 63c line rather than a 70c line.
Line direction: Chicago moved from 57c on August 13 to 63c, and the intraday series shows the move continuing from 62c to 63c rather than fading.
Alt ladder divergence: the first five innings over 2.5 runs market reads 75c on Kalshi and 65c on Polymarket, the widest cross-platform gap on the board.
Home split: Chicago is 35-24 at Wrigley Field, and St. Louis is 29-26 away, a narrower home and road edge than the moneyline gap suggests.
Chicago closed a road trip in Washington on August 13, and that board is still live at Cubs vs Nationals. St. Louis arrives from Philadelphia, where the Phillies vs Cardinals series board tracked the same rotation. Season-long context for both clubs lives on the Chicago Cubs and St. Louis Cardinals team hubs, and the division race that frames this series runs through the Milwaukee Brewers page.
This market resolves on the outcome of the St. Louis Cardinals at Chicago Cubs game played at Wrigley Field on August 14, 2026, with a scheduled first pitch of 1:20 p.m. CT. The moneyline contracts resolve to the team that wins the game, paying $1 per share for the winner and $0 for the loser. The run line contracts settle on the final margin of victory, and the total and team total contracts settle on official runs scored, including extra innings. Kalshi and Polymarket both settle from the official MLB final score once the game is declared complete. If the game is postponed and replayed on a later date, the contracts follow each platform's rescheduling rules; if the game is suspended and never completed, contracts resolve per each platform's void and refund policy.
As of August 14, 2026, the Chicago Cubs are 63c on both Kalshi and Polymarket and the St. Louis Cardinals are 38c on both books. That is an implied 63% win probability for Chicago at Wrigley Field.
The Cubs are favored at 63c, an implied 63% chance. Chicago is 71-51 with a 35-24 home record and starts Clay Holmes at a 2.86 ERA, against a St. Louis team at 61-60 starting Matthew Liberatore at a 5.15 ERA.
The game trades on both Kalshi and Polymarket. The two moneyline contracts carry about $12.0K of the roughly $20.8K tracked across the full board, which also includes run line, total, team total, and first-inning markets.
Chicago at -1.5 prices at 43c on both books and Chicago at -2.5 at 32c. The full-game total sits just under 8.5 runs, with over 8.5 at 45c and over 7.5 at 55.5c as of August 14, 2026.
It resolves once the August 14, 2026 game at Wrigley Field goes final, first pitch 1:20 p.m. CT. Both platforms settle from the official MLB final score, usually within hours of the last out.
Watch for confirmation of both probable starters and any late lineup scratch. The Cubs have already moved from 57c on August 13 to 63c, so a Holmes scratch is the single event that would pull the price back toward the mid-50s.