The Cardinals have optioned reliever Michael Wacha to Triple-A Memphis, the St. Louis Post-Dispatch reports.
Wacha allowed a 4.58 ERA and struck out 14 against four walks over three starts covering 17 2/3 innings. The 19th-overall pick in the 2012 draft will be back in the majors to stay at some point, but the Cardinals likely don't want to stress his arm too much in his first full professional season. Wacha posted a 2.05 ERA in his nine starts for Memphis prior to being called up.