The procedure was recommended by Pirates medical director Dr. Patrick DeMeo last week and confirmed by Dr. James Andrews on Monday. Hart had traveled to Birmingham, Ala., to get a second opinion on the diagnosis.
Andrews will perform the surgery on Tuesday morning. Players undergoing this type of a procedure typically have an eight-to-10-month recovery period. The Pirates remain optimistic that Hart will be ready to pitch by the start of Spring Training next season.
Jenifer Langosch is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.