Here's the 2009 returning defensive players, ranked by Scout.com
(in order - best first)
S Taylor Mays, Jr. USC
DT Gerald McCoy, Soph. Oklahoma
S Eric Berry, Soph. Tennessee
LB Brandon Spikes, Jr. Florida
DE Jerry Hughes, Jr. TCU
DE Greg Hardy, Jr. Ole Miss
LB Eric Norwood, Jr. South Carolina
DT Terrence Cody, Jr. Alabama
LB Sean Weatherspoon, Jr. Missouri
DE George Selvie, Jr. USF
LB Navarro Bowman, Soph. Penn St
LB Mark Herzlich, Jr. BC
LB Greg Jones, Soph. Michigan St
LB Rennie Curran, Soph. Georgia
DT Ndamukong Suh, Jr. Nebraska (#30 overall)
Don't bet the farm on the Heisman...
(BTW - Charles Woodson - DB Michigan - was the only primarily defensive player to win the Heisman in 1997)