During Twinsfest, Benson did an interview with 1500, like most of the players do. He was talking about his injuries and said that the microfracture surgery was to a non-weight-bearing part of the knee. He made it sound less serious than the normal microfracture surgery, but I'm sure it's likely difficult either way.
I don't know if that's different from those two athletes, but he made a point of mentioning it.
There are not many not-weight bearing parts of the knee
Microfracture surgery is to repair worn cartilage usually on the meniscus. What they do is the make tiny fractures on the healty bone, which stimulates new cartilage production. Fairly painless outpatient procedure, done with a scope and takes an hour to an hour and a half or so. But. The pain is the aftermath. You got to keep the knee practically immobile (and not bearing any weight
) for about a month. And that is why there is about 50% failure rate. People are not in pain so they put weight in their knee... This is pretty common in Basketball not so in Baseball. Jeff Clement also had this done few years ago... Outside sports is a knee replacement alternative procedure, done usually to arthritic folks.