The Guardians placed Kwan on the 10-day injured list Tuesday with mid-back inflammation.
Kwan had missed five consecutive starts due to the back issue, and though the Guardians had initially labeled him as day-to-day, the club ultimately determined that he would require more down time. and now his absence will be even longer than anticipated. Cleveland selected Myles Straw's contract from Triple-A Columbus in a corresponding move to bolster their outfield depth, but Angel Martinez is expected to serve as the primary replacement for Kwan atop the batting order and in left field.