On Dec. 13, 1997 Michigan CB Charles Woodson became the first primarily defensive player to win this award
The Morning After: 
Raiders vs Chargers, Week 16 Dec 25, 10:32a; Raiders .... Woodson knows the "
CB"s and "S"s so well that he could prolley burn them easily [DOC] [TLE] Michigan Wolverines - WikipediaAudio [PAR] Michigan's defense was led by cornerback and Heisman Trophy-winner Charles 
Woodson.