Barrero signed a minor-league contract with the Cardinals on Saturday and received an invitation to spring training, Francys Romero of BeisbolFR.com reports.
Barrero owns just a .497 OPS across 447 plate appearances in his major-league career, and his offensive woes followed him to Triple-A last season, where he slashed .188/.277/.345 over 49 games. His chances of contributing for the Cardinals will remain low as long as he continues to struggle at the plate, though the 26-year-old may still see a healthy amount of playing time with Triple-A Memphis.