do some research on this site my man... type in "tren" in the search forum box and you will find enough information to keep you reading for 3 days straight.
but let me just say this; first off, I would think that you are under 21 since you want it for football season. Its not recommended that you take this supplement, as you may do more harm than good. But I realize that you'll probably take it regardless of what I say.
secondly, there is no such thing as "get big real quick"...obtaining muscle is a long-term commitment...
If you do decide to take the tren anyway, do PLENTY of research before you even think about taking even 1 pill. You dont seem to know the basics, which is AN ABSOLUTE MUST. Before you start the cycle, you need everything in place, including:
preloading supplements
cycle support supplements
proper PCT
diet (proper macro ratios, etc)
If i were to give you my honest advice, I'd recommend a solid pre and post workout supplement, some weight gainer, and ALOT of eating. Take this advice and you WILL GROW. no doubt about it