Rodney as a te. What was he 6'6" 185 lbs comming into college? Now 210 on a day after eating pasta. I think you have Rodney mixed up with Trevor. Trevor is probably under 6'7" and is about 250, which makes him very similar to Gronkowski. Trevor has some of the best hands in basketball, an impressive vertical, and likes contact. If he doesn't make the NBA you just never know. I am guessing that he would have good straight ahead speed being such an athlete.
As far as Rodney goes he was blessed with an incredible jumping ability on a small frame. I wouldnt say he was blessed with other great athletism as far as quickness goes. He just never had the mental game of basketball come, he never got beyond beying a poor ball handler, and a below average shooter. Athletiscm can only take you so far and for Rodney that was highlight dunks and blocks. If he was 6'9" 230 that would be enough.