Mark Prior will make at least three minor league rehab starts, beginning Monday with an outing for the team's Class A affiliate at Peoria, Ill. Prior will rejoin the Cubs after Monday's outing and then make one more start for the Chiefs. His third start will be with a farm team yet to be determined. Prior threw about 30 pitches from the Wrigley Field bullpen Saturday. He's been on the disabled list all season as he works his way back from a sore shoulder. "I feel good and the arm is coming around," Prior said. "The timing is off. ... It will come."