bigbody1!!

I am a college football player. I am 6 foot 3, 245 lbs, and play defensive tackle. I am looking to gain size and strength this summer. I am doing a 5 day a week workout program with the school so I do not need tips with exercising. But can anyone suggest a diet and good supplements to take. I am currently taking amplified creatine, beta alanine, androgel, and protein.