Mariners vs Rockies Prediction, Odds, Moneyline, Spread & Over/Under for Sept. 24

Odds updated as of 5:13 a.m.

In MLB action on Wednesday, the Seattle Mariners take on the Colorado Rockies.

Before you do any MLB betting on this game at FanDuel Sportsbook, here's everything you need to know.

Mariners vs Rockies Game Info

• Seattle Mariners (88-69) vs. Colorado Rockies (43-114)
• Date: Wednesday, September 24, 2025
• Time: 9:40 p.m. ET
• Venue: T-Mobile Park -- Seattle, Washington
• Coverage: ROOT Sports NW and COLR

Mariners vs Rockies Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: SEA: (-320) | COL: (+260)
• Spread: SEA: -1.5 (-140) | COL: +1.5 (+116)
• Total: 7.5 -- Over: (-110) | Under: (-110)

Mariners vs Rockies Probable Starting Pitchers

Probable Pitchers: Luis Castillo (Mariners) - 10-8, 3.63 ERA vs Tanner Gordon (Rockies) - 6-7, 6.00 ERA

The probable starters are Luis Castillo (10-8) for the Mariners and Tanner Gordon (6-7) for the Rockies. Castillo's team is 14-17-0 against the spread in his starts this season. Castillo's team has been victorious in 58.3% of the games he's started as the moneyline favorite with a record of 14-10. The Rockies have an 8-5-0 ATS record in Gordon's 13 starts with a set spread. The Rockies have a 7-6 record in Gordon's 13 starts this season when they were the moneyline underdog.

Mariners vs Rockies Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Mariners win (69.9%)

Mariners vs Rockies Moneyline

• Colorado is a +260 underdog on the moneyline, while Seattle is a -320 favorite at home.

Mariners vs Rockies Spread

• The Rockies are at the Mariners, and are +1.5 on the runline. The Rockies are -140 to cover the spread, and the Mariners are +116.

Mariners vs Rockies Over/Under

• The Mariners-Rockies contest on Sept. 24 has been given an over/under of 7.5 runs. The over is set at -110 and the under at -110.

Bet on Seattle Mariners vs. Colorado Rockies on FanDuel today!

Mariners vs Rockies Betting Trends

• The Mariners have been victorious in 64, or 59.8%, of the 107 contests they have been chosen as favorites in this season.
• Seattle has played as a favorite of -320 or more just one time this year and came away with a loss in that game.
• The Mariners and their opponents have gone over in 82 of their 152 games with a total set by sportsbooks this season.
• The Mariners are 68-84-0 against the spread in their 152 games with a line set by sportsbooks this season.
• The Rockies have been the underdog on the moneyline 147 total times this season. They've finished 38-109 in those games.
• When playing as a moneyline underdog with odds of +260 or longer, Colorado has a 3-17 record (winning just 15% of its games).
• In the 152 games oddsmakers have set an over/under for the Rockies, they have combined with opponents to go over the total 66 times (66-81-5).
• The Rockies have put together a 62-90-0 record against the spread this season (covering 40.8% of the time).

Mariners Player Leaders

• Cal Raleigh leads Seattle in OBP (.359) and total hits (141) this season. He's batting .245 batting average while slugging .586.
• Among qualifying hitters in baseball, his batting average ranks 100th, his on-base percentage ranks 21st, and he is third in slugging.
• Julio Rodriguez leads Seattle in slugging percentage (.474) thanks to 66 extra-base hits. He's batting .268 with an on-base percentage of .322.
• He is 41st in batting average, 89th in on-base percentage and 35th in slugging among qualified hitters.
• Josh Naylor is batting .292 with a .461 slugging percentage and 91 RBI this year.
• Naylor has logged a hit or more in nine games in a row. In his last 10 games he is hitting .375 with three doubles, a home run, two walks and 11 RBIs.
• Eugenio Suarez has 47 home runs, 113 RBI and a batting average of .229 this season.

Rockies Player Leaders

• Hunter Goodman has a team-high slugging percentage (.521) while leading the Rockies in hits (145). He's batting .279 and with an on-base percentage of .324.
• Including all the qualified hitters in MLB, his batting average places him 25th, his on-base percentage ranks 82nd, and he is 12th in slugging.
• Mickey Moniak has 19 doubles, eight triples, 24 home runs and 22 walks while batting .270. He's slugging .521 with an on-base percentage of .307.
• Jordan Beck has an on-base percentage of .326, a team-high for the Rockies.
• Tyler Freeman is batting .281 with 20 doubles, two triples, two home runs and 34 walks.

Mariners vs Rockies Head to Head

• 9/23/2025: 4-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -300, Underdog Moneyline: +245)
• 4/21/2024: 10-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 11, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 4/21/2024: 2-1 COL (Favorite: Mariners, Spread: -1.5, Total: 10.5, Favorite Moneyline: -190, Underdog Moneyline: +160)
• 4/20/2024: 7-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 9.5, Favorite Moneyline: -184, Underdog Moneyline: +154)
• 4/16/2023: 1-0 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -300, Underdog Moneyline: +245)
• 4/15/2023: 9-2 SEA (Favorite: Mariners, Spread: -1.5, Total: 8, Favorite Moneyline: -250, Underdog Moneyline: +205)
• 4/14/2023: 5-3 SEA (Favorite: Mariners, Spread: -1.5, Total: 8.5, Favorite Moneyline: -178, Underdog Moneyline: +150)

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