Thomas out 4-6 weeks with broken arm

November 6, 2009 -- Chicago Bulls forward Tyrus Thomas suffered a fractured radius of his left forearm during a weight training session this morning at practice. X-rays confirmed the injury and he will undergo surgery tomorrow. The surgery will be performed at Rush, by team physicians Dr. Brian Cole and Dr. John Fernandez, and assisted by Dr. Mark Cohen.

Thomas is expected to be out four to six weeks.

Thomas' injury almost certainly means rookie Taj Gibson will become the full-time starter at power forward until further notice. Gibson turned in his best game of the season against the Cavs, finishing with 11 points and 7 rebounds.

Gibson, the No. 26 pick in the draft out of USC, was a pleasant surprise during preseason and has been an important part of the Bulls' defensive improvement.