Cavaliers forward Kevin Love left Tuesday night's 109-101 loss to the Atlanta Hawks with back spasms.
Love scored seven points on 1-for-8 shooting and grabbed seven rebounds in 24 minutes. The 26-year-old has averaged 17.1 points and 10.2 rebounds over 30 games.
Love, who has dealt with back spasms in the past, has not missed a game in his first year with Cleveland following a summer trade from Minnesota involving 2014 top NBA draft pick Andrew Wiggins.
The Cavaliers, which host the Bucks (16-16) on Wednesday, have lost three of their last four games and are now in fifth place in the Eastern Conference standings.