I don't think he quit, I think he was put on some sort of leave. Aside from that, it sounds about right; Ritchie Incognito had issues with teams and personal fouls and was generally known as a very dirty player. I think it's not that much of an issue but I wouldn't say bullying is what Ritchie did; he was outright threatening Martin including racial slurs and all that. Google the full transcript, it was pretty much harassment.