Giolito (lat) was placed on the 10-day injured list retroactive to Sept. 14.
Giolito's lat strain is not a long-term concern, Scott Merkin of MLB.com reports.
Giolito won't pitch again this season after being diagnosed with a mild lat strain, Scott Merkin of MLB.com reports.
Giolito (14-9) allowed five earned runs on five hits and one walk while striking out 12 across six innings to take the loss Thursday against the Royals.
Giolito allowed two runs on three hits and one walk while striking out six over seven innings in a no-decision against the Angels on Friday.
Giolito (14-7) allowed two runs on four hits and three walks while striking out nine to pick up the loss against the Twins on Tuesday.
Giolito (14-6) allowed three hits and no walks while striking out 12 to turn in a complete-game shutout and earn the win Wednesday against the Twins.
Giolito (12-6) allowed two runs on five hits and a walk over six innings Sunday, striking out 13 and taking the loss against Oakland.
Giolito (12-5) picked up the win in Monday's 7-4 victory over the Tigers, giving up three runs on eight hits and two walks over six innings while striking out eight.
Giolito gave up one run on three hits and three walks while striking out nine through seven innings in a no-decision against the Mets on Wednesday.