Help!!! me gain mass

[Texashotshot]

I am a D1 footballplayer looking to gain as much mass as possible. i am currently 230 pounds and will have a two month period to lift and gain over the summer. I need some advice on "supplements" lol that will put on mass quick. the catch is that they either need to be untracable or i have to be able to get it out of my system before i report to fall camp.

[Matt]

Stats
Age
Height
Bf%
Training history
Cycle history
Diet??