Heredia was suspended for 50 games Thursday after testing positive for performance-enhancing substances, according to MiLB.com
Heredia, currently assigned to Houston's Rookie-level Dominican Summer League affiliate, tested positive for metabolites of Stanozolol and Boldenone. He hit .224 with two RBIs in 19 games but has not played in the minors since 2009. Now a pitcher, Heredia signed with Houston last month and was due to return to the DSL. His suspension will be effective at the start of this season.