Seattle closer David Aardsma tweaked his groin during his one-inning outing Thursday against San Diego, but the Mariners do not believe he will miss much time.

PEORIA, Ariz. — Seattle closer David Aardsma tweaked his groin during his one-inning outing Thursday against San Diego, but the Mariners do not believe he will miss much time.

“We don’t think it’s very serious and he might miss one outing hopefully and that’s it,” manager Don Wakamatsu said. “It was the very last pitch and he felt something in his groin. Hopefully, we caught it before it gets to be anything serious.”

Aardsma worked the third inning, issuing a walk to leadoff batter Yorvit Torrealba. He then got Everth Cabrera to hit into a double play. He induced Tony Gwynn Jr. to end the inning with a left-side groundout.

Aardsma started last season as the team’s set-up man, but when Brandon Morrow lost his effectiveness, Aardsma assumed the closer’s role on May 15. He had 38 saves in 42 opportunities after going 128 big-league appearances without a save.