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