Houston Astros vs Detroit Tigers Forecast, 8/18/2025 MLB Selections, Top Bets & Odds

Matchup: Houston Astros vs. Detroit Tigers

Event Date: Monday, August 18, 2025

Venue: Comerica Park, Detroit, MI

Broadcast: FanDuel Sports Network Detroit

Betting Lines: Houston (+162) Detroit (-196)

The Detroit Tigers (71-52) will face off against the Houston Astros (68-53) at Comerica Park on Monday. The betting line shows Houston at +162 while Detroit opens at -196, with the over/under set at 8.5. Starting pitchers for this game will be Spencer Arrighetti and Jack Flaherty.

The Houston Astros are currently averaging 4.3 runs per game, ranking 16th in the league. They’ve accumulated a total of 525 runs this season, boasting an on-base percentage (OBP) of .322. As a team, the Astros have recorded 189 doubles and hit 135 home runs. With a total of 502 RBIs and 1,057 hits, the team has a batting average of .258 and a slugging percentage (SLG) of .408. They have struck out 942 times but have also drawn 352 walks this year.

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With a strikeout-to-walk (K/BB) ratio of 3.13, the Astros’ pitching staff has a WHIP of 1.20. They have allowed 142 home runs and 480 total runs, ranking 6th in the MLB. Houston’s pitchers have given up 928 hits this season (averaging 7.8 hits per 9 innings) and have an earned run average (ERA) of 3.76 (9th overall). The team has struck out 1,147 batters while walking 366 and has a FIP of 3.84 this year.

The Astros’ bullpen has achieved a save rate of 75.0%, entering 122 save situations and inheriting 121 runners this season, with 26.4% of them scoring. Relief pitchers have been called upon 89 times with baserunners already on base and have appeared 119 times in high-leverage situations. Overall, the Astros’ bullpen has had 377 appearances this season and accumulated 72 holds (11th in MLB), recording 36 saves while blowing 12 of their 48 save opportunities.

The Detroit Tigers have recorded 3,228 putouts, 946 assists, and 49 errors, holding a fielding percentage of .988, ranking 6th in the league. They have successfully turned 76 double plays. The Astros have converted 70.7% of balls put in play into outs, placing them 11th in baseball with 9,684 innings played.

Spencer Arrighetti has pitched for 163 innings throughout his MLB career, amassing 187 strikeouts. He holds an ERA of 4.75 (allowing 86 earned runs) and a WHIP of 1.416. Over his career, he has allowed 155 hits (8.6 hits per 9 innings) and has walked 76 batters. Arrighetti has an 8-16 career record and a FIP of 4.67, having faced 716 hitters in the league.

This season, the Detroit Tigers are sporting a team OBP of .316 and a batting average of .249. They have struck out 1,085 times (ranked 4th in MLB) while achieving a total of 1,031 hits. The Tigers have launched 158 home runs this year, racking up 568 RBIs. Their team SLG% is .421, and they are averaging 4.78 runs per game, placing them 8th in the league. They’ve also posted 189 doubles and received 372 walks, with a total run count of 588.

The Tigers’ pitching unit has allowed 511 runs this season with an overall ERA of 3.83 (464 earned runs). They have surrendered 138 home runs and allowed 4.22 runs per 9 innings (ranked 11th overall). The Tigers’ WHIP sits at 1.224, and they have a collective FIP of 3.93. They currently maintain a K/BB ratio of 8.60 (1,048 strikeouts to 351 walks) and rank 15th in the league for total hits allowed, with 985 hits given up.

The Detroit bullpen has a score inherited rate of 27.4% from their 186 inherited runners. Their relief pitchers have been brought in 104 times during high-leverage scenarios and 134 times with runners on base. In 109 save situations, the Tigers have notched 57 holds, along with 16 blown saves. Ranked 7th in baseball with a save percentage of 67.3%, they have used 379 bullpen pitchers this season. Detroit has seen their relievers enter during 49 save opportunities, securing 33 saves.