On Dec. 22, 1949, In his 13th game as a Celtic, Tony Lavelli scored 26 points as Boston beat the Minneapolis Lakers, who were on their way to a second straight NBA title. At halftime, the versatile Lavelli treated the 5,206 fans at Boston Garden to an accordion mini-concert, one of about two dozen performances he gave around the league for which he was paid $125 per concert by the NBA.