Cardinals call up 6 players, including RH Wacha
Wacha pitched four scoreless innings in relief against the Reds last week in St. Louis before going back to the minors.
He was called up from Double-A Springfield to make his fifth career start at Great American Ball Park. Wacha has struck out 37 batters during 33 1-3 innings in the majors.
The Cardinals also called up left-hander Tyler Lyons and right-hander Carlos Martinez from Springfield.
Infielders Ryan Jackson and Brock Peterson were called up from Triple-A Memphis. Peterson led the Pacific Coast League with 25 homers. Catcher Audry Perez was promoted from Memphis and added to the 40-man roster.