ORLANDO, Fla. — The Orlando Magic franchise must learn from its mistakes.



It is time to move rookie lottery pick Mo Bamba out of the rotation and install Khem Birch as the second-string center.



On Saturday night, with Bamba out because of a sore left foot, the Magic employed Birch as the primary backup to Nikola Vucevic against the Boston Celtics, and the results should not be ignored. Displaying an energy and a grit that Bamba too often has lacked this season, Birch helped anchor Orlando’s previously hapless second unit. The Magic snapped a four-game losing streak and upset the Celtics 105-103 at Amway Center.



In 18 minutes, Birch scored four points, collected 10 rebounds, blocked four shots and made valuable contributions that do not show up in a traditional box score.



“Khem Birch came up huge for us, not playing all season and coming in and changing the game with big plays,” Vucevic said. “A couple of offensive...