​From Wikipedia, the free encyclopedia.   Walter Ray Allen (born July 20, 1975) is an American professional basketball player who is currently playing for the Boston Celtics in the National Basketball Association. He has played professionally for the Milwaukee Bucks, Seattle SuperSonics, and the Boston Celtics; and collegiately for the University of Connecticut Huskies. One of the most accurate 3-point and free throw shooters in NBA history, he is a ten-time NBA All-Star and won an Olympic gold ...