Maxner began his hockey career with an incredible junior Hockey career. He began his NHL with the Boston Bruins and played there for parts of 2 seasons, from 1964 to 1966. In 61 games he had 17 points.
After playing for the Bruins, Maxner played professional hockey for 10 seasons. He spent time in Canada, the U.S and the Netherlands. Maxner retired in 1974 and went onto coach in both the OHL and the NHL.