Dwane Casey said Kyle Lowry's back tightened up on him during Saturday's loss to the Cavs. He left the game in the first half and returned in the middle of the third quarter. Lowry hasn't really dealt with back problems during the season since 2010, so there's really no reason to panic. He was able to play through it and finished with six points, five boards and seven assists in 22 minutes. The Raptors play Golden State on Monday.