Terms of the deal announced Friday weren't released.
The 6-foot-6 guard out of Oklahoma State bypassed his senior year and was the 20th pick in the June NBA draft after finishing sixth in the nation in scoring at 22.3 points per game last season.
Anderson, the Big 12 player of the year, also averaged 5.8 rebounds and 2.4 assists for the Cowboys. He is Oklahoma State's No. 2 career scorer with a 17.9-point average in 101 games, including 99 starts.