Go travelling januvia and chf Several high-profile players failed drug tests in 2012, including Melky Cabrera, Guillermo Mota, Bartolo Colon, Marlon Byrd, Yasmani Grandal and Carlos Ruiz. Those incidents led MLB and the Players Association to revamp the drug-testing program to include the more sophisticated carbon isotope ratio exam that can detect the presence of exogenous testosterone in a player's urine sample.