Oakland Athletics pitcher Bartolo Colon was suspended 50 games for testing positive for a performance-enhancing drug, as first reported by Jon Heyman of CBS Sports.
Major League Baseball confirmed the failed drug test and suspension via Twitter.
The suspension comes less than a week after San Francisco Giants All-Star Melky Cabrera was suspended for testing positive, also for testosterone. Like Cabrera, the 39-year-old will miss the remainder of the regular season.
Colon issued an apology shortly after the suspension was announced.
"I apologize to the fans, to my teammates and to the Oakland A's," Colon said in a statement, via MLB.com. "I accept responsibility for my actions and I will serve my suspension as required by the Joint Drug Program."
Both positive drug tests seem to add credence to BALCO president Victor Conte's claim that there is widespread use of of synthetic testosterone among MLB players. Conte recently claimed that "as much as 50 percent" of ballplayers use performance-enhancing drugs.
The former Cy Young Award winner leads the A's in wins with a 10-9 record and has a 3.43 ERA.
Oakland issued a statement as well, saying that the team is "disappointed to learn of today's suspension."
A's reliever Grant Balfour spoke to the Associated Press about losing his teammate for the final 40 games while the team continues to battle for a spot in the playoffs.
"It's a shock," Balfour said. "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."
Oakland is a half-game out in the AL wild-card race and takes on Minnesota Wednesday afternoon.