San Antonio Spurs star Victor Wembanyama was named the NBA's defensive player of the year on Monday, becoming the first unanimous winner in the award's 43-year history.France international Wembanyama, a generational talent who has helped transform San Antonio into title contenders, earned a perfect 100 votes in the media ballot.Oklahoma City's Chet Holmgren came in second in the voting, with Detroit's Ausar Thompson ranked third.