Iwakuma was placed on the DL prior to Friday’s series opener against Minnesota, retroactive to April 21. The right-hander was scheduled to start the series finale against the Twins, and the Mariners did not announce who would start in Iwakuma’s place on Sunday.
Iwakuma (0-1) has struggled in his three starts this season, giving up 12 earned runs in 16 1/3 innings. Manager Lloyd McClendon was asked about Iwakuma prior to Friday’s game but made no mention of a potential injury.
Seattle recalled left-handed reliever Lucas Luetge to take Iwakuma’s spot on the 25-man roster. Luetge has made five appearances with Triple-A Tacoma this season.