You have to wonder if him pursuing this lawsuit will damage his career. Honestly, I don't really doubt that he was injured and told to just play through it, or misled. That's an aspect of high level sports that is all too common. It's not right, and if it did happen he deserves compensation for it happening. That doesn't mean that pursuing compensation won't damage his career prospects. Will NBA teams, or teams in Europe look at this and say, "nope don't want that guy." Who knows?
When I was in high school I had tendinitis in my knee. It hurt like heck and my club coach just kept telling me the only solution was to just play through it and it would eventually go away. Eventually it just hurt too much to play and I went to a doctor and got physical therapy. I was out for a couple of months, but afterwards I was back to new again. Coaches just want their players out there playing, they don't always think about what is best for the athlete in these circumstances.