Mayers (lat) fired a scoreless two-thirds of an inning Friday during which he allowed no hits and two walks in Triple-A Memphis' loss to Iowa. He now owns a 2.45 ERA through 3.2 innings across four rehab appearances.
The right-hander is out of minor-league options, so the Cardinals will keep him busy during his rehab assignment in order to prepare him for an eventual return to the big-league bullpen. Mayers was enjoying an impressive season prior to suffering his lat injury in mid-April, and he'll look to regain his form during his remaining time with the Redbirds.