BASEBALLMajor League BaseballMLB — Suspended St. Louis (GCL) RHP Yeison Medina 50 games after testing positive for heptaminol, a stimulant, in violation of the Minor League Drug Prevention and Treatment Program. American LeagueNEW YORK YANKEES — Placed INF/OF Martin Prado on the 60-day DL. Selected the contract of INF Jose Pirela from Scranton-Wilkes-Barre (IL). National LeagueCHICAGO CUBS — Agreed to terms with Iowa (PCL) on a two-year player development contract extension through the 2018 season.