NEW YORK -- Bartolo Colon declined to directly address questions on Friday regarding a controversial procedure performed last year to repair ligament damage and a torn rotator cuff, helping to revive his stalled big league career.
Speaking to reporters after the Yankees' 5-4 loss to the Red Sox, Colon said that he would let the Major League Baseball Players Association handle all inquiries concerning the issue.
"I'm sure of myself -- I'm sure about the aspect of what I've done," Colon said through an interpreter. "They know the right and wrong of the situation. They know more."
The New York Times first reported that Colon was treated in April 2010 by Dr. Joseph R. Purita, who has used human growth hormone in similar treatments. Purita has denied using HGH in Colon's case.
MLB is investigating the procedure, which Yankees general manager Brian Cashman said he was unaware of when the club signed Colon as a free agent in January. Use of HGH is banned by MLB.
Purita said that he traveled to Colon's home in the Dominican Republic for the procedure, in which he took fat and bone marrow stem cells from Colon and injected them back into the 37-year-old's right shoulder and elbow.
Colon made the Yankees' roster as a long-shot candidate this spring and has pitched in the rotation since Phil Hughes was lost to injury. Colon is 2-2 with a 3.74 ERA in eight games (five starts).
-- Bryan Hoch