Just gain as much
lean muscle as you can without adding fat. The problem comes when people say, "I want to gain 20 pounds in six months." If they aren't gaining enough, they will just eat more and more and eventually add enough fat to get there. I think setting a specific amount is a negative way to look at what you want to do. Just think about your goals:
1. Gain as much muscle as you can between wrestling seasons
2. Get as strong as you can before your next season
3. Keep you bodyfat as low as you can while
building muscle
Just focas on those three things. If you gain 15 pounds or 40 pounds it doesn't matter, as long as you are getting the most out of your workout and diet. It shouldn't matter how much you weigh, as long as the three things above are achieved.