The Cardinals optioned Baker to Triple-A Memphis on Saturday.
Baker was never able to get his bat going this spring, tallying nine hits in 44 at-bats while striking out 13 times. Baker slashed .334/.439/.720 with 33 homers and 98 RBI in Triple-A last season, and if he's able to find his swing again in the minors, he may return to the Cardinals' bench at some point this summer.