Reyes (hamstring) will begin a rehab assignment Tuesday with Triple-A Columbus, Tom Withers of the Associated Press reports.
Reyes has been out since May 25 with right hamstring tightness. He resumed batting practice Wednesday, and he'll likely get in a couple workouts with the Guardians before heading out on his rehab assignment. It's unclear how many games he'll need at Columbus before he's ready to rejoin the big-league roster.