O'Neill (hamstring) was sent to Triple-A Memphis to begin a rehab assignment Saturday, Jenifer Langosch of MLB.com reports.

EDGE Analysis

O'Neill has been out since July 5 with a left hamstring strain. Given the timing, he'll likely spend a few days in Memphis before returning to St. Louis after the All-Star break, though he's not a lock to return to the majors once healthy.