Reliever Sean White won't need surgery and rest will likely calm what has been diagnosed as a inflamed bicep tendon - but it's unlikely he'll pitch again this season.
A key to the Seattle bullpen much of the year, White was a setup man who had a career season.
Still, if the injury that has sidelined him since Aug. 28 is not major, the Mariners will consider themselves fortunate.
White, 28, appeared in 52 games this season, going 3-2 with one save and a 2.80 earned run average.
"We'd love to get him back, even for a game, but they're talking about him needing two weeks," manager Don Wakamatsu said. "If he misses two weeks, he won't be able to work himself back in time."
White will be rexamined by team physicians on Tuesday in Seattle.