Bulls guard Jimmy Butler hyperextended his elbow on Sunday and will have an MRI on Monday to determine the extent of the injury, according to ESPN .
Butler left the game in the first half and did not return. The Bulls recently lost point guard Derrick Rose for at least a month with a knee injury, so they can ill-afford another loss.
"It's tough to lose players to injuries," Bulls center Joakim Noah said. "We just got to -- the games keeps coming. It's disappointing that we lost tonight. Hopefully [Butler's] going to be all right, just get ready for the next one."
Butler leads the Bulls in scoring, averaging 20.4 points per game. He was seen leaving the game with a walking boot and has already missed time this season because of the same injury.
"Nobody feels sorry for us," Noah said. "We just got to hope he's all right and come ready to work."