Astros vs Tigers Prediction, Odds, Moneyline, Spread & Over/Under for Aug. 20

Odds updated as of 12:11 p.m.

The Houston Astros will take on the Detroit Tigers in MLB action on Wednesday.

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

Astros vs Tigers Game Info

• Houston Astros (69-57) vs. Detroit Tigers (75-53)
• Date: Wednesday, August 20, 2025
• Time: 1:10 p.m. ET
• Venue: Comerica Park -- Detroit, Michigan
• Coverage: MLB Network, FDSDET, and SCHN

Astros vs Tigers Odds & Moneyline

• All MLB odds, betting lines and prop bets are available on FanDuel Sportsbook.
• Moneyline: HOU: (-122) | DET: (+104)
• Spread: HOU: -1.5 (+138) | DET: +1.5 (-166)
• Total: 8.5 -- Over: (-100) | Under: (-122)

Astros vs Tigers Probable Starting Pitchers

Probable Pitchers: Framber Valdez (Astros) - 11-6, 3.01 ERA vs Charlie Morton (Tigers) - 8-10, 5.20 ERA

This contest's pitching matchup is set, as the Astros will send Framber Valdez (11-6) to the mound, while Charlie Morton (8-10) will take the ball for the Tigers. Valdez's team is 10-13-0 against the spread in his starts this season. Valdez's team has been victorious in 57.9% of the games he's started as the moneyline favorite with a record of 11-8. The Tigers have gone 7-12-0 against the spread when Morton starts. The Tigers are 5-4 in Morton's nine starts this season that they were the underdog on the moneyline.

Astros vs Tigers Prediction & Pick

All MLB win probability predictions and picks are according to numberFire.
Prediction: Astros win (51.2%)

Astros vs Tigers Moneyline

• Detroit is a +104 underdog on the moneyline, while Houston is a -122 favorite on the road.

Astros vs Tigers Spread

• The Tigers are at +1.5 on the runline against the Astros. The Tigers are -166 to cover the spread, and the Astros are +138.

Astros vs Tigers Over/Under

• The Astros-Tigers game on Aug. 20 has been given an over/under of 8.5 runs. The over is set at -100 and the under at -122.

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Astros vs Tigers Betting Trends

• The Astros have been chosen as favorites in 81 games this year and have walked away with the win 43 times (53.1%) in those games.
• This season Houston has been victorious 30 times in 59 chances when named as a favorite of at least -122 on the moneyline.
• The Astros and their opponents have hit the over in 56 of their 125 games with a total set by oddsmakers this season.
• In 125 games with a line this season, the Astros have a mark of 62-63-0 against the spread.
• The Tigers have won 45.5% of the games this season they were the underdog on the moneyline (15-18).
• When it has played as a moneyline underdog with odds of +104 or longer, Detroit has a 7-13 record (winning only 35% of its games).
• The Tigers have combined with opponents to hit the over on the total 60 times this season for a 60-56-6 record against the over/under.
• The Tigers have a 59-63-0 record against the spread this season (covering 48.4% of the time).

Astros Player Leaders

• Jose Altuve leads Houston with a slugging percentage of .463, fueled by 41 extra-base hits. He has a .278 batting average and an on-base percentage of .342.
• Among the qualifying hitters in the majors, his batting average ranks 32nd, his on-base percentage ranks 53rd, and he is 50th in slugging.
• Jeremy Pena has 116 hits and an OBP of .367, both of which lead the Astros this season. He's batting .310 and slugging .479.
• His batting average is fourth among qualified players, his on-base percentage 20th, and his slugging percentage 33rd.
• Yainer Diaz is batting .252 with a .413 slugging percentage and 53 RBI this year.
• Carlos Correa has nine home runs, 39 RBI and a batting average of .278 this season.
• Correa takes a four-game hitting streak into this matchup. During his last five outings he is batting .263 with a double and an RBI.

Tigers Player Leaders

• Gleyber Torres has racked up an on-base percentage of .360, a team-best for the Tigers. He's batting .262 and slugging .400.
• Including all the qualifying hitters in the big leagues, his batting average puts him 66th, his on-base percentage ranks 26th, and he is 107th in slugging.
• Spencer Torkelson is batting .241 with 24 doubles, 26 home runs and 56 walks. He's slugging .473 with an on-base percentage of .335.
• He ranks 119th in batting average, 68th in on-base percentage and 41st in slugging percentage in the majors.
• Riley Greene has racked up a team-high slugging percentage (.505) while pacing the Tigers in hits (126).
• Zach McKinstry is hitting .259 with 18 doubles, nine triples, 10 home runs and 41 walks.

Astros vs Tigers Head to Head

• 8/19/2025: 1-0 DET (Favorite: Tigers, Spread: -1.5, Total: 7.5, Favorite Moneyline: -158, Underdog Moneyline: +134)
• 8/18/2025: 10-0 DET (Favorite: Tigers, Spread: -1.5, Total: 8, Favorite Moneyline: -152, Underdog Moneyline: +128)
• 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)

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