Robinson and Pistons forward Kyle Singler each received technical fouls and Pistons guard Brandon Knight was called for a flagrant foul with 2:32 remaining in the first quarter after Knight was called for a travel and raised his arm, hitting Butler in the face. Robinson then appeared to push Knight, and Singler and other players joined the fray before the players were separated. Butler made both free throws to cut Detroit's lead to 24-15.
Joakim Noah and Marco Belinelli sat out for the Bulls. Noah has missed five straight games for plantar fasciitis in his right foot, and Belinelli has sat out four games with a strained abdominal muscle. Bulls coach Tom Thibodeau said both players are day to day. Noah had career highs of 30 points and 23 rebounds against Detroit on Dec. 7.
Will Bynum (hand) and Jason Maxiell (eye) were out for the Pistons. Maxiell remained in Detroit to get his eye examined.
Chicago went 7-7 in March.
NOTES: The NBA upgraded Gibson's shooting foul against LeBron James in the Bulls' 101-97 victory over the Miami Heat on Wednesday to a flagrant foul, according to the South Florida Sun Sentinel. The victory snapped Miami's 27-game winning streak, the second longest in NBA history. "I guess we have to call the league and get clarification," Thibodeau said. "I didn't see it that way. I still don't have a good understanding of what a flagrant foul is. I thought I got some clarity last year, but apparently I didn't." ... Knight returned for the Pistons from an ankle injury he suffered Friday.