First paragraph, reports that I have read. A search will show multiple articles all reporting over 50% use.
Second paragraph, I didn't say this was his actual second chance. That's why I put second chance in quotes, it is the concept of giving someone a "second chance". I am not shilling for anyone, just acknowledging that people can change and that players that have more talent will get more leeway, a concept that you seem to be unable to acknowledge. Another concept you may not have heard of that it helps to know someone in order to get a job. I, myself have been given the chance to interview for jobs just because I knew someone with influence, it happens all the time, in every industry.
Third paragraph, I didn't accuse anyone of criminal behavior. I said that I would not be surprised if over 50% of NFL players smoked marijuana. I based that off of the articles I have read from people that should know more than I do on it's use among NFL players.
Forth paragraph, like I previously posted, if he has stopped his knucklehead behavior, then I am all for people changing their lives for the better. You're wrong though, talent does matter, so do connections, but without the talent the connection would not matter.
Fifth paragraph, I am not worried about your post or anyone else's post. I just believe that you are overreacting to Kelly's signing. If he has changed his behavior, then maybe he catches on with another team or stays a back up, good for him. If he hasn't changed his behavior, then he will be gone, which is too bad for him.