Donald Arvid Nelson (born May 15, 1940) is an American former professional basketball player and head coach. Nelson is second all-time in regular season wins of any coach in NBA history, with 1,335 (he held the record for most wins for almost 12 years). He coached the Milwaukee Bucks, the New York Knicks, the Dallas Mavericks, and the Golden State Warriors. After an All-American career at the University of Iowa, Nelson won five NBA championships playing with the Boston Celtics, with his number 19 retired by the franchise in 1978. His unique brand of basketball is often referred to as "Nellie Ball". A coaching innovator, Nelson is credited with, among other things, pioneering the concept of the point forward, a tactic which is frequently employed by teams at every level today. He was named one of the Top 10 coaches in NBA history. On April 7, 2010, Nelson passed Lenny Wilkens for first place on the all-time NBA wins list with his 1,333rd career win. His all-time record coaching record was 1,335–1,063 (.557). He was inducted into the Naismith Basketball Hall of Fame in 2012. Early life The son of Arvid and Agnes Nelson, Don Nelson grew up with his family and two sisters on his grandfather's rural Illinois farm near Sherrard, Illinois. He first learned basketball shooting in the chicken yard where a spokeless bicycle wheel was nailed to the shed to make a basket. Nelson attended a one-room, six-grade, seven-student school. When his family lost the farm, the Nelsons moved to nearby Rock Island, Illinois, while Don was in middle school. His father Arvid eventually worked at the Rock Island Arsenal. Nelson attended Rock Island High School, in Rock Island, one of the Quad Cities. The Nelsons lived in downtown Rock Island on 19th street and Don would walk to school, stopping to shoot baskets at several different locations along the way. Nelson would go to the YMCA after practice and shoot more. Graduating in 1958, Nelson led the Rocks to a 47–7 record in his last two years under coach Bob Riley. He had 39 points and 20 rebounds against Moline High School and 30 points and 29 rebounds against No. 1-ranked Ottawa High School. As a junior, Nelson averaged 12.6 points as Rock Island finished 25–3. As a senior, Nelson averaged 20.2 points, leading the Rocks to a 22–4 record in 1957–58. After his senior year