Bartolo Colon has been suspended for 50 games for testing positive for testosterone. (Jonathan Daniel / Getty Images)

Colon, the 39-year-old former Cy Young winner, has a 10-9 record with a 3.43 ERA for the A’s. The suspension was first reported by Jon Heyman of CBS

With his team in the running for a wild-card spot, the timing could not be worse, as it was across the Bay last week when the San Francisco GiantsMelky Cabrera drew a 50-game suspension for using the same drug. Like Cabrera, Colon took responsibility for the failed test and apologized.

“I apologize to the fans, to my teammates and to the Oakland A’s,” Colon said in a statement (via Yahoo’s Jeff Passan). “I accept responsibility for my actions.”

Colon will miss the final 40 regular-season games and either 10 postseason or 2013 games.

“It’s a shock,” A’s reliever Grant Balfour said (via “He’s a guy that we’re definitely relying on right now. I guess you could say it’s bad timing any time, but especially now.”

In a statement, the team said:

“The Oakland Athletics are disappointed to learn of today’s suspension of pitcher Bartolo Colon. The organization fully supports Major League Baseball's Joint Drug Prevention and Treatment Program and its efforts to eliminate performance-enhancing substances from our game. Per the Basic Agreement, the A's will have no further comment.”

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