Roy fought plenty of guys Tarver's size and speed. Roy in his prime was much different fighter than he was when he fought Tarver. If Hopkins could counter Tarver, and not get hit than prime Roy would have never been hit. Tarver had a hard time keeping up with Hopkins, but Roy has much faster feet than Hopkins. I could easily see Roy ko'ing Tarver or more likely finding out that its just as easy to take him to a UD, but I think it would be very stupid of him to fight Tarver like he did Griffin... Tarver is a southpaw who is a pretty good counter puncher and he can punch pretty hard.