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Astros Face Mariners Tonight in Key AL West Series

A matchup between Brandon Walter and Luis Castillo could determine which team builds momentum in the AL West battle

Jul 18, 2025; Seattle, Washington, USA; Seattle Mariners starting pitcher Luis Castillo (58) pitches to the Houston Astros during the first inning at T-Mobile Park. Mandatory Credit: Steven Bisig-Imagn Images

Overview

  • Game 1 of the three-game set opens tonight at T-Mobile Park with first pitch scheduled for 10:10 p.m. EDT.
  • Houston holds a 56–40 record atop the AL West while Seattle is 51–45, trailing by five games entering the series.
  • The teams meet for the eighth time this season, with the Astros leading the head-to-head series 4–3.
  • Astros starter Brandon Walter (1–2, 3.98 ERA) is set to face Mariners ace Luis Castillo (6–5, 3.41 ERA) in Game 1.
  • Houston looks to rebound from a five-loss skid before the All-Star break, while Seattle rides a three-game sweep of Detroit into the weekend.