1969 Topps basketball card of former Boston Celtic Don Nelson. Nelson started his National Basketball Association career with the Chicago Zephyrs in 1962, played 2 years with the Los Angeles Lakers, then signed on with the Celtics, where he played the last 12 years of the 15 he totaled. Nelson was one in a long line of Celtic “sixth men”, an important part of the team’s winning formula as the first man off the bench to spell the starters. He played on 5 Boston championship teams. Nelson entered the NBA coaching ranks after he retired, and became the winningest coach in league history, guiding the Milwaukee Bucks, New York Knicks, Dallas Mavericks and Golden State Warriors. As a coach, he was an innovator, and invented the “point forward” position that a lot of teams use today. His unique system became known as “Nellyball”.