Gosder Cherilus traveled to Germany after last season for an alternative treatment on his knee, a procedure that's not yet approved for therapeutic use by the Food and Drug Administration but one that has become increasingly popular with athletes, two sources told the Free Press.

The therapy, known as Regenokine, involves removing and incubating a patient's blood, then injecting it back into the body.

Cherilus, an unrestricted free agent who underwent microfracture surgery on his right knee in December 2010, did not return phone calls seeking comment last week but said by text message Friday he never went to Germany and denied receiving any treatment.

"I didn't get any treatment done, and what I do during the off-season is not ur business," he wrote.

However, the Radisson Blu Media Harbour hotel in Dusseldorf, located a short walk from the office of Dr. Peter Wehling, who pioneered the blood manipulation treatment, posted a photo identifying Cherilus and dated Jan. 29 on its Facebook page.