Bears center Lucas Patrick broke his thumb on the second day of training camp, a source said, but the initial prognosis is that he will be back in time for the season opener. The team still has more than six weeks before it faces the 49ers.
In the meantime, there could be plenty of shuffling. When Patrick exited practice Thursday, the Bears replaced him with sixth-round pick Doug Kramer, giving them two rookies on the offensive line with Braxton Jones at left tackle.
