Boston completed with the greatest common-season record in the NBA, but its title streak ended with a loss to Chamberlain and the Philadelphia 76ers in the Eastern Division finals.
Although attempting to find a higher-flying foul ball, Rockies catcher Brian Serven tore off his mask and threw it at the nearest umpire.
BallBack leaders mentioned the enterprise is struggling to stay afloat and obtain one more location to sell its ball return.