Mets' Sierra, Jays' Pena receive suspensions
Rookie-level pitchers tested positive for banned substances
Two Rookie-level pitchers have been suspended for violations of the Minor League Drug Prevention and Treatment Program. Mets left-hander Jose Sierra received a 56-game ban after testing positive for the performance-enhancing substance Stanozolol, while Blue Jays righty Luis Pena will miss 72 games after testing positive for metabolites of Stanozolol, the