Mariners general manager Jerry Dipoto said Monday that the team plans to stretch Nate Karns (back) out as a starter.
Mariners placed RHP Nate Karns on the 15-day disabled list with a lower back strain.
Nate Karns earned his first save Saturday since being demoted to the bullpen.
In his first appearance after being moved to the pen, Nate Karns struck out six in two scoreless innings Wednesday against the Pirates.
Mariners manager Scott Servais announced Tuesday that Nate Karns has been moved to the bullpen.
Nate Karns surrendered four runs on five hits and two walks while striking out three in five innings, leading the Mariners to a 5-4 victory over the Cardinals on Saturday.
Nate Karns allowed five runs on seven hits over five innings against the Tigers on Monday.
Nate Karns took a no-decision against his former team the Rays on Wednesday after striking out eight batters in five innings, allowing two runs on two walks and four hits.
Nathan Karns struggled mightily with his control in taking a no-decision against the Indians on Thursday, walking five and allowing one run over 4 1/3 innings.
Nate Karns was pounded by the Texas Rangers on Saturday, giving up seven runs -- all earned -- while giving up eight hits and five walks in four innings in the loss.
Nate Karns struck out six while allowing two runs over 6 2/3 innings in Monday's 9-3 win over the Padres.
Nathan Karns was unable to earn his fifth victory of the season in taking a no-decision against the A's on Tuesday, surrendering three runs on five hits over five-plus innings.
Nate Karns moved to 4-1 after limiting the Orioles to one run in five innings on Thursday.
Nate Karns pitched impressively while earning a no-decision against the Astros in Saturday's 3-2 win, surrendering just one run on six hits over 6 1/3 innings.