The Seminoles will go into 2017 ranked in the top five, if not No. 1. But Dalvin Cook will not be their only major loss. The FSU defense had an up-and-down season, but through it all stood Walker. The senior was sixth nationally with 21.5 tackles for lost yardage and the 134 yards lost on those stops ranked No. 2. His 16 sacks were a big part of those numbers and he was a force that lived in the opposing backfield. The Noles will get star safety Derwin James back from injury, but Walker’s absence will be felt.