Alex Hoppe says the Mariners are taking a real risk into Dodger Stadium, with Luis Castillo scheduled to open the series carrying a 3-9 record and a 4.85 ERA. For a pitcher who has long been a symbol of stability for Seattle, this is not the kind of form the Mariners wanted as they try to keep their postseason push alive.
The timing makes the matchup even more interesting. The Dodgers and Mariners were widely expected to meet in the World Series last season, but Seattle never got that far and fell to the Blue Jays instead. Now the Mariners arrive in Los Angeles trying to steady themselves, while the Dodgers are back at home after a 6-2 win over Seattle on Thursday and a 9-4 loss to the Red Sox on Friday night, even with a Shohei Ohtani go-ahead home run.
Castillo’s recent struggles
The concern is not just the season line. This month, Castillo has been the losing pitcher of record in each of his three outings, and he has allowed five home runs in his last two starts. That is a sharp drop-off for a starter the Mariners have leaned on since acquiring him at the deadline in 2022.
When a pitcher of Castillo’s standing is giving up that kind of damage, the margin for error disappears quickly. Against a Dodgers lineup that can punish mistakes at home, Seattle will need a much cleaner version of its veteran starter than the one that has shown up recently.
Why the opener matters for Seattle
The series opener is not only about one pitcher, though. The Mariners are still fighting to enter the postseason, and every game now carries extra weight. If Castillo can settle the game early, Seattle gives itself a chance to control the tone of the series.
If he cannot, the pressure shifts immediately onto a Mariners staff that has relied on him for reliability. That is what makes this matchup so important: it is not simply about one bad stretch, but about whether Seattle can trust one of its most established arms when the season is tightening up.
For the Dodgers, the response is straightforward. They have already shown they can score enough to win at Dodger Stadium, and after the Red Sox setback they will want a stronger overall performance in front of their own crowd. For Seattle, the opener is a chance to stop the slide. For Castillo, it is a chance to remind everyone why he has mattered so much since 2022.
