Why would he need to gain 15-20 lbs right away? D Brooks played very good at 226-227, and it wasnt til later in his career naturally he gained more weight and ended his career playing 235. Smith even playing at 223 would be ok. Because of the style of defense the Cowboys use. I dont understand why people are making a big deal about his weight, but dismiss Donalds weight.
Ok then if you have seen Gardner, while he has played inside and he can, he was mostly an outside rusher. Mauro was used more inside because of his strength.