Astros vs. Mariners Betting Lines, Odds, & Player Matchups September 20, 2025

Data Skrive
Data Skrive

The Houston Astros (84-70) host the Seattle Mariners (85-69) on Saturday at Daikin Park, starting at 7:10 p.m. ET. The Astros are favored on the moneyline (-115), while the Mariners are -105 underdogs, even though they are favored against the spread (1.5) with +154 odds. Framber Valdez starts for Houston while Seattle will counter with George Kirby.

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Odds to Win

Astros to win vs Mariners -115

Bet $20, Payout $37.39

Astros vs. Mariners betting lines

  • Favorite: Astros (-115)
  • Underdog: Mariners (-105)
  • Over/under: 8

Astros betting info, hitting leaders, & pitching

Astros betting info

  • The Astros have won 52.5% of the games this season when they were the moneyline favorite (52-47).
  • Houston has gone 47-40 (winning 54% of its games) when playing as moneyline favorites of -115 or shorter.
  • The implied moneyline probablility in this matchup gives the Astros a 53.5% chance to win.
  • Houston has played in 154 games with set over/under, and have combined with opponents to go over the total 69 times (69-78-7).
  • The Astros have a 78-76-0 record ATS this season (covering 50.6% of the time).

Astros hitting info

  • Jose Altuve has a team-best 26 home runs.
  • Altuve ranks 39th in home runs and 63rd in RBI among all batters in MLB.
  • Jeremy Pena is hitting .303 to pace his team.
  • Pena ranks 120th in home runs and 122nd in RBI among MLB hitters this season.
  • Yainer Diaz is hitting .256 with 23 doubles, a triple, 19 home runs and 20 walks.
  • Carlos Correa is batting .276 with 27 doubles, 13 home runs and 41 walks.
  • Correa enters this game on a four-game hitting streak. During his last five outings he is hitting .300 with two doubles and a walk.

Astros pitching rankings

  • The Astros pitching staff is No. 1 in the majors with a collective 9.4 strikeouts per nine innings.
  • Houston’s 3.84 team ERA ranks eighth across all MLB pitching staffs.
  • The Astros have the fifth-lowest WHIP in MLB (1.223).
  • Astros pitchers combine to allow 189 total home runs at a rate of 1.2 per game (22nd-fewest in MLB).
  • Houston its 4-0 loss the last time out, the team struck out 10 Mariners batters while allowing nine hits.

Mariners betting info, hitting leaders, & pitching

Mariners betting info

  • The Mariners have entered the game as underdogs 46 times this season and won 22, or 47.8%, of those games.
  • Seattle is 18-21 this season when entering a game as the underdog by -105 or more on the moneyline.
  • Oddsmakers have implied with the moneyline set for this matchup that the Mariners have a 51.2% chance to win.
  • Seattle and its opponents have gone over the total this season in 83 of its 154 opportunities.
  • The Mariners have an ATS record of 66-88-0 in 154 games with a spread this season.

Mariners hitting info

  • Cal Raleigh leads Seattle in home runs with 56 and runs batted in with 118.
  • In all of Major League Baseball, Raleigh is first in homers and third in RBI.
  • Julio Rodriguez has 169 hits and an OBP of .321 to go with a slugging percentage of .479 this season.
  • Rodriguez ranks 14th among batters in the big leagues in homers, and 18th in RBI.
  • Josh Naylor leads Seattle with a .289 batting average while slugging 20 homers and driving in 87 runs.
  • Naylor brings a six-game hitting streak into this game. In his last 10 games he is hitting .366 with two doubles, two home runs, two walks and 10 RBIs.
  • Eugenio Suarez has 127 hits and an OBP of .300 to go with a slugging percentage of .529 this season.

Mariners pitching rankings

  • The Mariners have an 8.7 K/9 this season as a pitching staff, 10th-best in baseball.
  • Seattle pitchers have a combined ERA of 3.90 ERA this year, which ranks 13th in MLB.
  • The Mariners have a combined 1.235 WHIP as a pitching staff, eighth-lowest in MLB.
  • The Mariners have allowed the 16th-fewest home runs this season with 183, or 1.2 per game.
  • Last time out, Seattle defeated the Astros, 4-0, with 11 strikeouts and three hits allowed.
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Betting Guide

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