"I lost vision of my own man, a careless mistake," Green said. "I don't know what to say. I get paid too much to make that kind of mistake."
Derrick Williams scored 15 points and Dante Cunningham had 11 for the Wolves, who are hopeful that Roy's chronic knee issues have not returned.
Roy sat out all of last season, but felt rejuvenated this summer after receiving an experimental treatment to try to address the lack of cartilage in both knees. In need of a veteran shooting guard who could get his own shot late in games, the Wolves signed him to a two-year deal. He played at least 21 minutes in each of the first four games this season, issuing no complaints.
Coach Rick Adelman said it was too soon to tell how serious the injury was, but Roy planned to make the trip to Chicago for the team's game on Saturday in case he was feeling good enough to play.
The Pacers have some serious injury problems of their own. They found out this week they are going to have to play without leading scorer Danny Granger for the next three months because of an issue with his left knee, dealing a big blow to a scrappy team that gave the Miami Heat all they could handle in the playoffs last season. They've struggled to replace his offense, only topping 90 points twice this season.
"Our margin for error is very small," Pacers coach Frank Vogel said. "We've got young and inexperienced players in there at crunch time. We dropped a couple of games because of it. That's what we're trying to overcome without Danny Granger."
NOTES: Pacers C Roy Hibbert had 10 points, but was on the bench most of the fourth with foul trouble. ... The Pacers are 0-3 on their current road trip. ... Barea will not make the trip to Chicago. He will be evaluated again on Sunday, with the possibility of joining the team in Dallas.