Phillies general manager Ruben Amaro Jr. said that then they will know if Lidge, who visited team physician Michael Ciccotti on Friday, has structural damage in his right shoulder.
"He was actually better in his exam than he was a couple of days ago," Amaro said. "He still has some posterior soreness in his shoulder and will have an MRI Tuesday in Philadelphia. That's where we have a baseline on previous exams Brad has had and we can compare things. We'll go from there. We don't have a diagnosis until we know what the MRI looks like. We'll treat it from there."
Lidge had been sidelined for two weeks this month because of biceps tendinitis in his right arm. He pitched in a Minor League game on Tuesday and a Grapefruit League game Thursday. He said Friday that he has pain in the back of his right shoulder, which is troubling.
Lidge said Friday that he thinks he could return by mid-April, but that remains to be seen.