Bucks starting center John Henson out for Game 3

CHICAGO, IL - JANUARY 28: John Henson #31 of the Milwaukee Bucks shoots a free throw against the Chicago Bulls at the United Center on January 28, 2018 in Chicago, Illinois. The Bucks defeated the Bulls 110-96. NOTE TO USER: User expressly acknowledges and agrees that, by downloading and or using this photograph, User is consenting to the terms and conditions of the Getty Images License Agreement. (Photo by Jonathan Daniel/Getty Images)

MILWAUKEE — Milwaukee Bucks starting center John Henson will miss the playoff game Friday night against the Boston Celtics with a sore back.

Seven-footer Tyler Zeller, who used to play for Boston, is listed as the probable starter. The Bucks trail Boston 2-0 in their best-of-seven, first-round Eastern Conference playoff series.

Coach Joe Prunty has also listed Malcolm Brogdon as the probable starter over Tony Snell at guard alongside Eric Bledsoe. The Bucks’ starting backcourt has been outscored 96-25 in the first two games by Boston’s starting guard duo of Terry Rozier and Jaylen Brown.

Henson was second on the team in rebounding, averaging 6.8 per game. The Celtics have decisive edges in offensive rebounding (20-12) and second-chance points (42-13) going into Game 3.