William Walton Sharman (May 25, 1926 – October 25, 2013) was an American professional basketball player and coach. He is mostly known for his time with the Boston Celtics in the 1950s, partnering with Bob Cousy in what was then considered the greatest backcourt duo of all time. As a coach, Sharman won titles in the ABL, ABA, and NBA, and is credited with introducing the now-ubiquitous morning shootaround.
Sharman was the first North American sports figure to win a championship as a player, coach, and executive. He was a 15-time NBA champion (having won four titles as a player with the Celtics, one as head coach of the Los Angeles Lakers, and ten as a Lakers executive), and a 17-time champion in basketball overall counting his ABL and ABA titles. Sharman is also a two-time Naismith Memorial Basketball Hall of Fame inductee, having been inducted in 1976 as a player, and in 2004 as a coach. Only John Wooden, Lenny Wilkens, Tommy Heinsohn and Bill Russell share this double honor.
Sharman is also notable for coaching the 1971–72 Los Angeles Lakers to an NBA record 33-game win streak, a then-record regular season 69–13 win–loss mark, and the first Lakers championship in Los Angeles.