Michael Cooper
3
4
Mike Kelley
Mike Kelly
NABC Defensive Player of the Year was created in 1987.
The NFL Defensive Player of the Year for 2010 is Troy Polamalu.
WNBA Defensive Player of the Year Award was created in 1997.
NBA Defensive Player of the Year Award was created in 1983.
Kobe Bryant
I don't believe he was defensive player of the year before, although, he has been elected to the first team defensive players of the year multiple times.
2005
USA Today High School Defensive Player of the Year was created in 1982.