Cardinals manager Oli Marmol said Saturday that Herrera (back) experienced no pain after Friday's rehab outing with Triple-A Memphis, John Denton of MLB.com reports.
As the designated hitter Friday, Herrera went 1-for-3 with one home run, three RBI and one walk. Marmol noted that Herrera will start behind home plate soon, and a return to the majors will hinge on the 24-year-old's ability to start at catcher on back-to-back days. Before landing on the injured list June 22 with lower-back tightness, Herrera was slashing .279/.340/.378 with three home runs and 19 RBI over 191 major-league plate appearances.