Celtics’ 6th man Don Nelson passes on: 5-time champ retired as NBA all-time winningest and most innovative coachBy Professor Parquet for www.celticsblog.comA.k.a. You playin’ like Don Nelson, man. The scene is a fictional one-on-one game featuring the accompanying trash talk a presumably urban player jibes the Nelson imitator with as “Don” slowly backs the defender towards the hoop. Think of Don Nelson, and several images come to mind, many of an innovative mindset. Don Nelson died Sunday at age 86, leaving a legacy of unconventional and effective coaching, as well as a long and underrated playing career.