East coast salmon: Luis Castillo, -.229 WPA
West coast salmon: Mitch Haniger, .206 WPA
Game thread comment of the day:
Yes, that is an important stat.
Unfun fact of the day:
Coming into this game, the Mariners had a 29-18 record on Opening Day, best among American League franchises and second-best in MLB (the Mets! are best, at 41-21). Furthermore, the Mariners have been even better at home, with a .655 winning percentage on home openers, third-best among all active franchises. Welp. See the game thread comment of the day, above.