Per Carrie Muskrat:
MESA, Ariz. -- Wade Miller has won the fifth starter spot in the Cubs rotation, beating out Mark Prior, whose status is uncertain. Cubs manager Lou Piniella confirmed Miller won the job before Tuesday's game. "He's going to be our fifth starter," Piniella said of Miller, who spent last season rehabbing his right shoulder. The right-hander did make five starts in September. "He's pitched well in camp and has earned a spot.You can read the full article here.
It's still uncertain if Prior will end up on the DL or in Iowa.