Vest (2-4) retired two batters via strikeout but also allowed two runs on two hits and a walk to blow the save and take the loss Thursday against the Mariners.
Detroit's top closing option, Jason Foley, had pitched each of the previous two games, so the Tigers turned to Vest on Thursday. The righty struggled as he blew his fifth save chance of the season. Vest still has a solid 3.16 ERA overall, and he should continue to see high-leverage work, but the late-inning situation in Detroit's bullpen remains murky. Foley hasn't recorded a save since July 10 but still leads the team with 15, while Vest, Tyler Holton and Shelby Miller are seem like candidates to get save opportunities down the stretch as well.