CHICAGO (AP) The Seattle Mariners have placed right-hander Nathan Karns on the 15-day disabled list with a lower back strain a day after he was roughed up in a relief appearance.
Right-hander Cody Martin was recalled from Triple-A Tacoma before Saturday's game against the Cubs.
Chicago scored five runs in two innings off Karns in Friday's 12-1 romp. He gave up three hits, walked three and allowed a home run to David Ross.
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Karns began the season as a starter, but was moved to the bullpen in June. He has a 5.15 ERA.
Martin has appeared in two games and thrown four innings for Seattle this season, allowing one run and five hits.