Skip Schumaker (oblique) went 2-for-4 Wednesday in a minor league rehab game at Triple-A Memphis. The Cardinals were planning to leave Schumaker at the Triple-A level until early next week to be sure that he's sufficiently tuned up for major league action. But Lance Berkman could be headed to the 15-day disabled list with a calf strain, opening a spot on the Cardinals' 25-man roster. Schumaker has already played in a handful of rehab games and might just be rushed back.