Tim Duncan is calling it quits after nearly two decades as the face and backbone of the San Antonio Spurs. The quiet, big man is ending his 19-year NBA career with one franchise having centered five NBA championships for the Spurs. The No. 1 overall pick in 1997 goes out with two MVP awards among his list of accomplishments. Duncan was one of just four players to be named NBA Finals MVP at least three times. He was a 15-time All-Star, a member of the All-NBA first team 10 tim