Cleveland Guardians vs Miami Marlins Prediction Market Odds, July 12, 2026
| Spread | Total | ML | Best ML | |
|---|---|---|---|---|
â–¶Guardians | +1.5 66%62% | O 8.5 47%47% | 48%48% | 48% Kalshi |
â–¶Marlins | -1.5 34%38% | U 8.5 53%53% | 53%53% | 53% Kalshi |
| Spread | Total | Moneyline | Best ML | |
|---|---|---|---|---|
â–¶Cleveland Guardians | +1.5 | O 8.5 | 48% Kalshi | |
â–¶Miami Marlins | -1.5 | U 8.5 | 53% Kalshi |
No player props available for this game.
The Miami Marlins (52-44) are the narrow home favorite over the Cleveland Guardians (50-46) at 53c on both Kalshi and Polymarket as of July 12, 2026, a near pick'em that leaves Cleveland at 48c. The two books agree to the cent on the moneyline, so there is no cross-platform edge on the winner, and the total sits at 8.5 runs (Over 47c on Polymarket, 48c on Kalshi). Miami sends Tyler Phillips (2-3, 3.28 ERA) against Cleveland's Joey Cantillo (7-4, 3.66 ERA) at loanDepot park.
The Guardians vs Marlins prediction market opens as one of the tightest games on the July 12, 2026 MLB slate, with Miami at 53c and Cleveland at 48c on the moneyline. Miami (52-44) sits eight games over .500 and owns a 31-19 home record at loanDepot park, while Cleveland (50-46) arrives 26-24 on the road. The 5c gap between the two sides prices home-field and a small starter edge, not a talent chasm.
Guardians vs Marlins Market Context
Miami is the 53c favorite on both Kalshi and Polymarket, an unusually clean agreement that removes any cross-platform arbitrage on the moneyline. Cleveland trades at 48c, and the two prices summing to 101 reflect the standard Kalshi vig rather than a wide market. The Kalshi Miami line opened at 54c overnight and has held at 53c, a flat session that signals no sharp money has moved the number into game day.
The run line tells the same close-game story. Cleveland at -1.5 trades at 38c, and Miami to win by more than 1.5 runs sits at 34c, both well under the moneyline because a one-run margin is the likeliest outcome in a game priced this tight. The total is set at 8.5 runs, with the Over drawing 47c on Polymarket and 48c on Kalshi, a coin-flip number that fits two starters carrying sub-3.70 ERAs.
Guardians vs Marlins Pitching Matchup
Miami sends right-hander Tyler Phillips (2-3, 3.28 ERA), whose ERA is the lower of the two probables and the reason the home side holds the moneyline edge despite a thinner win-loss line. Cleveland counters with left-hander Joey Cantillo (7-4, 3.66 ERA), who owns seven wins and has been the steadier source of length. The 0.38 ERA gap between the starters is narrow enough that the market leans on Miami's 31-19 home mark rather than the arms to justify the 53c price.
Miami's lineup is led by Otto Lopez at a .339 average, with Heriberto Hernandez pacing the team at 13 home runs and Liam Hicks driving in 58 runs. Cleveland's offense runs through Chase DeLauter, who leads the Guardians in average (.279), home runs (10), and RBIs (45), a single-bat concentration that raises the variance on the Cleveland run total.
When the Guardians vs Marlins Market Resolves
The market resolves on the final score of the game scheduled for July 12, 2026 at 1:40 PM ET at loanDepot park in Miami. The moneyline pays the team that wins the game, the run line settles on whether the margin covers 1.5 runs, and the total settles Over or Under 8.5 combined runs. If the game is postponed or suspended, the contracts settle per each platform's official MLB rules once the game reaches a final.
Key Guardians vs Marlins Factors
Starting pitching: Tyler Phillips (3.28 ERA) versus Joey Cantillo (3.66 ERA) is the tightest starter matchup on the slate and the anchor of the 53c line.
Home-field weight: Miami's 31-19 home record at loanDepot park is the main input behind the 5c moneyline gap.
Flat line signal: the Miami moneyline opened at 54c and holds at 53c, so no sharp money has moved the number into game day.
No cross-platform edge: Kalshi and Polymarket both price Miami at 53c, leaving no arbitrage on the moneyline.
Total at 8.5: the Over trades at 47c to 48c, a genuine coin flip that hinges on two sub-3.70 ERA starters.
DeLauter dependence: Chase DeLauter leads Cleveland in average, home runs, and RBIs, concentrating the Guardians' scoring in one bat.
Related Guardians vs Marlins Markets
Cleveland's full-season outlook trades on the Guardians season wins market, while Miami's is priced on the Marlins season wins market. Both clubs also appear on the MLB World Series market. For team-level context, see the Cleveland Guardians hub and the Miami Marlins hub, or browse the full MLB market board.
Resolution Criteria
The market resolves on the final result of the Cleveland Guardians at Miami Marlins game scheduled for July 12, 2026 at 1:40 PM ET at loanDepot park in Miami. The moneyline contract pays $1 per share on the team that wins the game and $0 on the loser. The run line settles on whether the winning margin covers 1.5 runs, and the total settles Over or Under 8.5 combined runs on the final box score. If the game is postponed, suspended, or shortened, each platform applies its official MLB settlement rules, which generally require the game to reach an official final before the market pays out.
Key Factors
- Starting pitching: Tyler Phillips (3.28 ERA) for Miami versus Joey Cantillo (3.66 ERA) for Cleveland
- Miami's 31-19 home record at loanDepot park drives the 5c moneyline gap
- Flat moneyline: Miami opened at 54c and holds at 53c into game day
- No cross-platform edge: Kalshi and Polymarket both price Miami at 53c
- Total set at 8.5 runs with the Over at 47c to 48c, a coin flip
- Chase DeLauter leads Cleveland in average, home runs, and RBIs
What are the current Guardians vs Marlins odds?
As of July 12, 2026, the Miami Marlins are the 53c moneyline favorite over the Cleveland Guardians at 48c, with both Kalshi and Polymarket pricing Miami identically at 53c.
When does the Guardians vs Marlins market resolve?
The market resolves after the game on July 12, 2026, scheduled for 1:40 PM ET at loanDepot park in Miami. Contracts settle once the game reaches an official final.
Where can I trade the Guardians vs Marlins market?
The Guardians vs Marlins market trades on Kalshi and Polymarket, and Prediction Genius shows both books side by side. On this game the two platforms agree at 53c for Miami.
Who is favored in Guardians vs Marlins?
Miami is favored at 53c, an implied win probability near 53%. Cleveland sits at 48c. The 5c gap reflects Miami's 31-19 home record and Tyler Phillips's 3.28 ERA edge over Joey Cantillo's 3.66.
What should I watch before Guardians vs Marlins resolves?
Watch the confirmed starters and the total, currently 8.5 runs with the Over at 47c to 48c. If either probable pitcher is scratched, the moneyline and total are the lines most likely to move before first pitch.