Herrera (knee) got eight plate appearances in a backfields game in Cardinals camp Wednesday, Brian Walton of TheCardinalNation.com reports.
Herrera -- who homered in his first plate appearance Wednesday -- has been slowed recently by knee inflammation. He had hoped to return to Grapefruit League action by now, but his participation in a "B" game suggests that should be coming soon. Herrera is expected to open the season as the Cardinals' primary designated hitter but will also see action at catcher.