The Pac-12 Defensive Player of the Year is an annual college basketball award presented to the top defensive player in men's basketball in the Pac-12 Conference. The winner was selected by conference coaches, who were not allowed to vote for players on their own team. The award began in 1984, when the conference consisted of 10 teams and was known as the Pacific-10. It stopped being issued starting in 1988 but was restarted in 2008. The conference added two teams and became the Pac-12 in 2011.