Rockies vs Cardinals Prediction Market Odds, August 7, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Rockies | +1.5 60%69% | O 8.5 53%52% | 25%26% | 26% Polymarket |
â–¶Cardinals | -1.5 40%31% | U 8.5 47%48% | 31%31% | 31% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Colorado Rockies | +1.5 | O 8.5 | 26% Polymarket | |
â–¶St. Louis Cardinals | -1.5 | U 8.5 | 31% Kalshi |
St. Louis is the 59c moneyline favorite over Colorado in the opener of a three-game set at Busch Stadium, and the two books agree exactly: 59c on Kalshi, 59c on Polymarket, with the Rockies at 42c on both. The 1c overround puts the Cardinals at roughly 58.4% implied after normalizing. The records are lopsided (Colorado 45-70, St. Louis 57-58) but the price is not, because the Cardinals are a sub-.500 home team at 28-32 in St. Louis. Kyle Leahy (7-4, 3.44 ERA) faces Ryan Feltner (4-5, 5.75 ERA), and the total is 8.5 with the over at 52.5c. The live board above carries current prices on every line.
The Rockies vs Cardinals opener is priced as a modest home favorite, not a mismatch. St. Louis sits at 59c on both Kalshi and Polymarket, Colorado at 42c on both, and that identical print across two independent order books is the cleanest signal on the page: there is no cross-platform edge on the moneyline tonight. First pitch is 8:15 p.m. ET at Busch Stadium, the first of three games between these clubs on August 7, 8 and 9, 2026.
Rockies vs Cardinals Market Context
Colorado enters at 45-70 and is the worst road team in the sample the market has to work with, at 18-38 away from Coors Field against 27-32 at home. That 20-game home-road split is the single largest structural input into the 42c road price. The Rockies were swept in their last three games by Tampa Bay, dropping 9-13 on August 4 and then both ends of a doubleheader on August 5 by 7-9 and 0-4. Hunter Goodman carries the offense with 33 home runs and 66 RBI, and Jake McCarthy leads the club at .293.
St. Louis is 57-58 and inverted relative to the usual shape: 29-26 on the road, 28-32 at home. The Cardinals took two of three at Yankee Stadium to close the last series, winning 13-7 on August 3, losing 0-2 on August 4, and taking the finale 3-1 on August 5. Jordan Walker is the run producer with 22 home runs and 81 RBI, and Alec Burleson leads the regulars at .287. Both clubs were off on August 6, so bullpens reset on both sides and neither manager is working around a short staff. Team pages for the Colorado Rockies and the St. Louis Cardinals carry the rest of each club's open markets.
Rockies vs Cardinals Pitching Matchup
Kyle Leahy (7-4, 3.44 ERA) starts for St. Louis against Ryan Feltner (4-5, 5.75 ERA) for Colorado. That 2.31-run ERA gap is the largest single edge on the card and is most of the reason a 57-58 team is a 59c favorite against a 45-70 team.
The strikeout props price the two starters as near-equivalents in volume despite the ERA spread, which is the more interesting read. Leahy's 5-plus strikeout line sits at 52c and his 6-plus at 36c. Feltner's 4-plus line sits at 50c and his 5-plus at 30c, so the market is modeling Leahy for roughly one extra strikeout and, implicitly, a longer outing. Both props trade on Kalshi only, so there is no second book to check them against.
Rockies vs Cardinals Run Line and Total
The run line tells the same story as the moneyline. St. Louis at -1.5 is 40.5c (40c Kalshi, 41c Polymarket) and Colorado at -1.5 is 31.5c (31c Kalshi, 32c Polymarket). A 59c moneyline favorite that only gets to 40.5c laying a run and a half is a market that expects a close game, not a comfortable one.
The total is 8.5 and the over is a coin flip at 52.5c (53c Kalshi, 52c Polymarket). Over 7.5 runs prices at 60c and over 9.5 at 41.5c, a tight ladder consistent with a mid-8s expectation. Team totals split the difference the same way the moneyline does: St. Louis over 4.5 runs is 51c, Colorado over 4.5 runs is 42c, a 9c gap that maps almost exactly onto the 17c moneyline gap. A run in the first inning trades at 51.5c.
The first-five-innings derivatives are where the two books actually disagree. Over 2.5 runs in the first five prints 81c on Kalshi against 76c on Polymarket, a 5c gap, and over 6.5 in the first five is 33c against 28c, another 5c. St. Louis at -1.5 through five innings is 39c on Kalshi and 35c on Polymarket. The Polymarket side is the better buy on every one of those overs and the Kalshi side is the better sell, which is the reverse of what the full-game lines show.
Rockies vs Cardinals Line Movement
The line has held. Across the snapshot window the Polymarket Rockies moneyline printed 42c on every reading with no intraday drift, and Kalshi has been at the matching 59c on the Cardinals side. Nothing in the pricing suggests a late scratch, a weather scare, or a lineup surprise has hit the market yet. The moneyline is also the deepest line on the board, with about $6.4K in combined lifetime volume on the Cardinals contract ($5.6K Kalshi, $794 Polymarket) against thin books on most of the derivative ladders.
When the Rockies vs Cardinals Market Resolves
The moneyline resolves the night of August 7, 2026, once the game is final at Busch Stadium. The winning team's contract pays $1 per share and the losing team's contract goes to $0, with no draw outcome in baseball. The run line settles on the final margin, the total on combined runs scored by both teams, and the first-five-innings markets on the score after the top and bottom of the fifth. Full terms are in the resolution notes below.
Key Rockies vs Cardinals Catalysts
Starter ERA gap: Leahy at 3.44 against Feltner at 5.75 is the widest single input into the 59c price.
Colorado road split: 18-38 away from Denver against 27-32 at home is why a 45-70 club still trades at 42c rather than lower.
St. Louis home weakness: 28-32 at Busch Stadium against 29-26 on the road caps the favorite at 59c.
First-five cross-platform gaps: the 5c splits on the first-five overs are the only real two-book divergence on the page.
Total at 8.5: the over at 52.5c is the closest thing to a true coin flip on the board.
Bullpen rest: both clubs were idle on August 6, removing the short-staff angle that usually drags a series opener.
Related MLB Markets
Every game on the slate is priced side by side on the MLB market hub, and the wider baseball board adds the other leagues trading the same day. For the rest of the day's cross-platform slate, including the games where Kalshi and Polymarket are further apart than they are here, today's board ranks everything currently live.
Resolution Criteria
Resolves to the team that wins the Colorado Rockies at St. Louis Cardinals game played at Busch Stadium on August 7, 2026, with a scheduled first pitch of 8:15 p.m. ET. The winning team's moneyline contract pays $1 per share and the losing team's contract resolves to $0; baseball has no draw outcome, so extra innings decide the market. Run line contracts settle on the final margin of victory, total-runs contracts settle on the combined runs scored by both teams at the final out, team-total contracts settle on that team's runs alone, and first-five-innings contracts settle on the score after the completion of the fifth inning. If the game is suspended, shortened by weather, or postponed to a later date, each platform applies its own official rules: Kalshi generally settles on the official score once the game is declared official by Major League Baseball, and Polymarket generally voids or rolls to the completion date. Settlement follows the platform's posting of the final result, not the nominal resolution date.
Key Factors
- Starter ERA gap: Kyle Leahy 3.44 versus Ryan Feltner 5.75, the widest input into the 59c favorite price
- Colorado road record 18-38 against a 27-32 home mark, the structural reason the Rockies price at 42c
- St. Louis 28-32 at home versus 29-26 on the road, which caps the Cardinals at 59c rather than higher
- First-five-innings overs split 5c between Kalshi and Polymarket, the only real two-book divergence on the board
- Total at 8.5 with the over at 52.5c, effectively a coin flip on run environment
- Both clubs idle on August 6, so neither bullpen enters the opener short
What are the current Rockies vs Cardinals odds?
As of August 7, 2026, St. Louis is the 59c moneyline favorite and Colorado is 42c. Kalshi and Polymarket print both sides identically at 59c and 42c, so there is no cross-platform gap on the moneyline for this game.
Who is favored in Rockies vs Cardinals on August 7, 2026?
The Cardinals are favored at 59c, which is about 58.4% implied probability after normalizing the 1c overround. The Rockies at 42c imply roughly 41.6%.
Where can I trade the Rockies vs Cardinals market?
The moneyline, run line and full-game total trade on both Kalshi and Polymarket. The strikeout props for Kyle Leahy and Ryan Feltner and the team-total ladders are Kalshi only, and the winning-after-five-innings market is Polymarket only.
What is the run line and total for Rockies vs Cardinals?
The total is 8.5, with the over at 52.5c (53c Kalshi, 52c Polymarket). On the run line, St. Louis at -1.5 is 40.5c and Colorado at -1.5 is 31.5c as of August 7, 2026.
When does the Rockies vs Cardinals market resolve?
It resolves the night of August 7, 2026, when the game goes final at Busch Stadium, with first pitch scheduled for 8:15 p.m. ET. The run line, total and first-five markets settle off the same final box score.
What should I watch before Rockies vs Cardinals resolves?
Watch the lineup card for Hunter Goodman, who leads Colorado with 33 home runs, and for Jordan Walker, who leads St. Louis with 22 home runs and 81 RBI. A late scratch on either would move the 8.5 total faster than it would move the 59c moneyline.