The Houston Astros visit the Seattle Mariners on Tuesday, September 22, 2026. Both teams are nearing the end of a tough season, with the Astros holding a 77-79 record and the Mariners at 73-83. Neither squad is in playoff position, which might influence how they approach this game.
Looking at the betting odds, the Mariners are favored at home, with a moneyline of -149. This means you’d need to bet $149 to win $100 on Seattle outright. The Astros are the underdogs at +123, so a $100 bet would return $123 if Houston pulls off the upset. The spread is set at 1.5 runs, with the Mariners giving those runs at -141 odds, and the Astros getting +1.5 at -171. The negative number on the Astros’ spread bet indicates you have to wager more to back them with the run cushion, showing the market sees some value there.
The total runs expected is 7.5, with even odds on both the over and under at -110. This suggests a moderately scoring game is anticipated, but it’s fairly balanced between offense and pitching.
In summary, the Mariners are slight favorites at home, but the Astros have a bit of value on the moneyline and spread. The total points toward a mid-range scoring game. Bettors should consider how much they trust Seattle’s home edge versus Houston’s ability to keep it close or pull off a win.