Chapel Hill, N.C ? North Carolina standout Tyler Hansbrough is out of practice indefinitely with a stress reaction condition in his right shin. The reigning Associated Press player of the year did not practice Thursday. Instead, team spokesman Steve Kirschner said he underwent an MRI that revealed the stress reaction. Kirschner said the injury could lead to a stress fracture if not properly treated. The school has issued a statement saying there was no timetable for his return.