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Rizzo says Anderson found and repaired “a little tear” known as a chondral flap that was irritating the ankle every time Eaton moved.

He hurt the knee in practice last week and was sent for an MRI, which revealed a chondral defect.

During his recovery from that surgery, he injured his left knee and was forced to have season-ending surgery on July 3 to repair a chondral defect.

One plausible theory is that chondral defects, namely the holes in the articular cartilage which spell bad news for footballers, could be involved but the issue has become something of a taboo subject.

The 26-year-old Kleiza underwent arthroscopic surgery on Wednesday to repair a meniscal tear and chondral defect, the Raptors said in a statement.