LOL, I cant believe that you are actually asking this question. And, to think it would make you a better player?
Think of it like this. Much like drinking alcohol gives people a false sense of security, most likely your pot is doing the same thing. Then think of when a police officer pull someone over for drinking, and gives them a salubrity test. As much as a person may think, or feel they can still do the same thing as when they are not high or drunk, we all have seen enough people take these test on tv to know that is far from the truth.
Then take into account if a coach ever finds out that you are high while under their supervision, their job is going to be more important to them than you wanting to feel high all the time. There is no question they will bench you at the very least, possible kick you off the team and not alow you to play for any of their teams football or otherwise, and potentially get you kicked out of school as well as have you arrested. This is not just a coaches concern for your safety, their job, legal responsibility but also your team mates safety.