7) Marcell Dareus, DT, Buffalo Bills: I thought the Bills would field the best defensive line in football last season. I was wrong on so many levels. But there were extenuating circumstances, from injury to tragedy.
Dareus' brother was killed in a triple-homicide in September. Understandably, he never seemed the same.
New Bills coach Doug Marrone made an astute hire by appointing Mike Pettine to be his defensive coordinator. Pettine worked wonders last season with New York Jets DL Muhammad Wilkerson. I think Dareus will dominate and anchor a turnaround for the Bills up front.