I'll give you three guesses why.
One-time MLB All Star got bounced from the Mexican Baseball League after league officials accused the fomer star of taking a banned substance without a prescription...again.
ESPN Deportes is reporting that the drug in question was testosterone, considered a performance enhancer in both the MLB and the MBL. Canseco was apparently given the opportunity to take a drug test and clear his name, but the 47-year-old slugger declined.
Canseco began trying out for the Quintana Roo Tigers this year with the publicly stated goal of returning to the major leagues, no small feat at his advanced age. Baseball insiders describe the Mexican league as Triple-A level ball, though unlike minor league teams, Mexican teams have no affiliation with American franchises.
Canseco did the virtual walk of shame on his twitter account, posting:
"How can I test positive when I never took any test don't believe everything the media tells you.the truth always comes out I am not using any illegal substanced," All I am on is prescription medication for low testosterone .legal and very important for my health."
Low testosterone is a common condition affecting men of Canseco's age. But the question remains: if he had a properly diagnosed ailment, why didn't he get a real prescription?
Whether or not Canseco was actually trying to gain a competitive edge is almost beside the point. Hasn't he ever heard the story of "The Boy Who Cried Wolf"?