Both teams have reasons to care about this one. Seattle is trying to stay attached to a wild-card race that's had them hovering a few games back most of August. Toronto's path is longer, but a team that's been scrapping since the trade deadline hasn't stopped trying.
Seattle's offense has been defined by extremes this month — capable of the 9-2 laugher over the Phillies and the 2-19 disaster against the Cubs in the same week. Cal Raleigh has been at the center of the good stretches, and how much of that carries into Toronto matters more than anything on the schedule page.
Toronto's rotation losses are piling up faster than the wins are, and Sunday's likely starter is going to be someone auditioning for a bigger role, not a name atop the depth chart. Seattle's bullpen has its own holes after multiple relievers went down for extended stretches, which is the kind of thing that shows up on getaway day.
By the time first pitch actually rolls around at 1:37 PM ET, both rosters will have absorbed two more games worth of results, injuries and bullpen usage. The version of these two teams that shows up Sunday won't look exactly like the one sitting in front of us now.