Ole Miss alum Mike Mayers is slated to make his major league debut for St. Louis tonight at Busch Stadium against the Los Angeles Dodgers. Yes, it’s the ESPN game. Mayers, a 6-foot-3 right-hander, was 3-3 with a 2.94 ERA at Triple-A Memphis. A third-round pick in 2013, he started this season at Double-A Springfield, going 5-2, 2.30. Mayers, who is not ranked among the Cardinals’ top 30 prospects by mlb.com, had surgery for thoracic outlet syndrome in 2015.