Tigers vs Astros Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 18

Odds updated as of 2:13 a.m.

Monday's slate in the MLB includes a matchup between the Detroit Tigers and the Houston Astros.

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

Tigers vs Astros Game Info

• Detroit Tigers (73-53) vs. Houston Astros (69-55)
• Date: Monday, August 18, 2025
• Time: 6:40 p.m. ET
• Venue: Comerica Park -- Detroit, Michigan
• Coverage: MLB Network, FDSDET, and SCHN

Tigers vs Astros Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: DET: (-142) | HOU: (+120)
• Spread: DET: -1.5 (+136) | HOU: +1.5 (-164)
• Total: 8.5 -- Over: (-108) | Under: (-112)

Tigers vs Astros Probable Starting Pitchers

Probable Pitchers: Jack Flaherty (Tigers) - 6-12, 4.76 ERA vs Spencer Arrighetti (Astros) - 1-3, 6.38 ERA

The Tigers will give the nod to Jack Flaherty (6-12) against the Astros and Spencer Arrighetti (1-3). Flaherty's team is 8-15-0 against the spread in his starts this season. Flaherty's team has a record of 6-8 this season when he starts and they are the favorite on the moneyline. The Astros failed to cover in all of Arrighetti's four starts that had a set spread. The Astros were named the moneyline underdog for two Arrighetti starts this season -- they lost both.

Tigers vs Astros Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Tigers win (57.1%)

Tigers vs Astros Moneyline

• Houston is the underdog, +120 on the moneyline, while Detroit is a -142 favorite at home.

Tigers vs Astros Spread

• The Tigers are hosting the Astros and are favored by 1.5 runs on the spread. The Tigers are +136 to cover the runline, with the Astros being -164.

Tigers vs Astros Over/Under

• The Tigers-Astros game on Aug. 18 has been given an over/under of 8.5 runs. The over is set at -108 and the under at -112.

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Tigers vs Astros Betting Trends

• The Tigers have been victorious in 51, or 63%, of the 81 contests they have been chosen as favorites in this season.
• Detroit has a record of 36-17 in contests when oddsmakers favor them by -142 or more on the moneyline.
• The Tigers' games have gone over the total in 59 of their 120 opportunities.
• The Tigers are 58-62-0 against the spread in their 120 games that had a posted line this season.
• The Astros have won 61.5% of the games this season they were the moneyline underdog (24-15).
• Houston is 9-1 (winning 90% of its games) when playing as a moneyline underdog of +120 or longer.
• The Astros have had an over/under set by bookmakers 123 times, and have combined with opponents to go over the total in 55 of those games (55-64-4).
• The Astros are 61-62-0 ATS this season.

Tigers Player Leaders

• Gleyber Torres leads Detroit with an OBP of .357 this season while batting .261 with 60 walks and 62 runs scored. He has a slugging percentage of .401.
• Among qualified hitters in baseball, his batting average ranks 71st, his on-base percentage ranks 31st, and he is 105th in slugging.
• Spencer Torkelson is hitting .242 with 24 doubles, 26 home runs and 54 walks, while slugging .477 with an on-base percentage of .335.
• Among qualifying batters, his batting average ranks him 119th, his on-base percentage 69th, and his slugging percentage 36th.
• Riley Greene leads Detroit in slugging percentage (.503) and total hits (125) this season.
• Zach McKinstry is batting .258 with a .336 OBP and 40 RBI for Detroit this season.

Astros Player Leaders

• Jose Altuve has accumulated a slugging percentage of .467, a team-best for the Astros. He's batting .280 with an on-base percentage of .345.
• Including all the qualified hitters in the majors, his batting average ranks 28th, his on-base percentage ranks 50th, and he is 44th in slugging.
• Jeremy Pena leads his team with 115 hits and a .370 OBP. He has a batting average of .313 while slugging .485.
• Including all qualifying players, he ranks third in batting average, 14th in on-base percentage and 29th in slugging percentage.
• Yainer Diaz has 16 doubles, a triple, 17 home runs and 16 walks while hitting .254.
• Carlos Correa is hitting .277 with 21 doubles, nine home runs and 31 walks.

Tigers vs Astros Head to Head

• 4/30/2025: 7-4 DET (Favorite: Astros, Spread: -1.5, Total: 8, Favorite Moneyline: -120, Underdog Moneyline: +102)
• 4/29/2025: 6-4 HOU (Favorite: Astros, Spread: -1.5, Total: 8, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 4/28/2025: 8-5 HOU (Favorite: Astros, Spread: -1.5, Total: 7.5, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 10/2/2024: 5-2 DET (Favorite: Astros, Spread: -1.5, Total: 7.5, Favorite Moneyline: -190, Underdog Moneyline: +160)
• 10/1/2024: 3-1 DET (Favorite: Astros, Spread: -1.5, Total: 6.5, Favorite Moneyline: -142, Underdog Moneyline: +120)
• 6/16/2024: 4-1 HOU (Favorite: Astros, Spread: -1.5, Total: 8, Favorite Moneyline: -166, Underdog Moneyline: +140)
• 6/15/2024: 13-5 DET (Favorite: Astros, Spread: -1.5, Total: 7.5, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 6/14/2024: 4-0 HOU (Favorite: Astros, Spread: -1.5, Total: 7, Favorite Moneyline: -118, Underdog Moneyline: -100)
• 5/12/2024: 9-3 HOU (Favorite: Tigers, Spread: -1.5, Total: 7.5, Favorite Moneyline: -116, Underdog Moneyline: -102)
• 5/11/2024: 8-2 DET (Favorite: Tigers, Spread: -1.5, Total: 7.5, Favorite Moneyline: -154, Underdog Moneyline: +130)

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