I'm 6'3", 215lbs and in my prime I was jumping out the gym. I used 2 dunk with my left on breaks a lot. It was something I would practice. I've even caught oops with my left and I wasn't the player D. Rose IS so 4 u 2 say there's NO way he's finishing strong with the left is erroneous brotha. And of course I understand there's no reason 4 u 2 believe me so check out this vid...
http://www.youtube.com/watch?v=w6G_RRGHzfA