I'm 17 years old and I play highschool football. Next year I'll be starting again at Middle Linebacker and I was hoping to get a lot bigger during this off-season. Are there any tips you can give me to gain some weight for next season. Right now I'm 5'11 about 175lbs.

You will need to sign up for one of my Football Programs as a first step.
Also, an important aspect in gaining weight is obviously eating correctly. Check out our nutrition section for some great fundamental information. Here is the address.
http://www.fitrex.com/nutrition.shtml