I'm a football player and i wanna get bigger,faster,quicker,and stronger; what kind of diet should i be doing?

I'm a football player and i wanna get bigger,faster,quicker,and stronger; what kind of diet should i be doing? i'm a lineman and i wanna improve for my last year of football...i got a workout program already i just need a diet to go with it. i weigh 240 and my height is 5'10 (if that helps)