Yasmani Grandal will be reinstated Tuesday from a 50-game suspension for a positive testosterone test.
The suspension called into question his numbers as a rookie catcher with the Padres.
Beyond saying he made a "mistake," Grandal has never told team officials why he took PEDs.
Grandal was part of San Diego's second-half resurgence in 2012, hitting .297 with eight home runs and 36 RBIs in 60 games.