A group of NBA related people (Commentators, reporters, etc.) are chosen to cast their vote.
NBA Defensive Player of the Year Award was created in 1983.
NBA Development League Defensive Player of the Year Award was created in 2002.
For the 1989-90 season, the winner of the NBA Defensive Player of the Year Award was Dennis Rodman of the Detroit Pistons.
rodman
1987
Hakeem Olajuwon - 1994
Dikembe Mutombo
Michael Cooper
Hakeem Olajuwaun did that feat two years in a row.
When a defensive player is in the paint for 3 seconds without an offensive player around him.
6× NBA champion, 6× NBA Most Valuable Player, 19× NBA All-Star, 2× NBA Finals MVP, 10× All-NBA First Team, 5× All-NBA Second Team, 5× NBA All-Defensive First Team, 6× NBA All-Defensive Second Team, 2× NBA scoring champion, 1970 NBA Rookie of the Year1970, NBA All-Rookie Team NBA all-time leading scorer, NBA's 50th Anniversary All-Time Team, 3× NCAA Men's Basketball Champion 3× NCAA Basketball Tournament MOP, Naismith College Player of the Year 2× USBWA College Player of the Year
NBA World Champion:1991 , 92 , 93 , 96 , 97 , 98 NBA Rookie of the Year:1985 NBA All Rookie Team:1985 NBA Defensive Player of the Year:1988 All NBA Defensive Team:1988 , 91 , 92 , 96 , 98 , NBA Slam Dunk Champion:1987 . 88 , Gold in the 1992 Barcelona Olympics