There are a number of variables to consider when dealing with the meniscus: was it the lateral or medial meniscus (one has a better blood supply and takes less time to heal but I can't remember which); what part of the meniscus was injured (again, blood supply); was it torn or just pinched; there are more variables but I've seen players come back in as little as two weeks but as long as ten. Btw, I use to be an athletic trainer at a D1 university and have witnessed a number of meniscal surgeries.