Dr. Keith Meister performed the surgery in Texas, and the Detroit Free Press first reported the surgery took place.
The surgery came exactly a week after Nathan left his rehab appearance at Triple-A Toledo with a severe elbow injury, later revealed to be tears of the ulnar collateral ligament and the flexor pronator. The surgery ended his 2015 season after four pitches, a one-out save on Opening Day against the Twins. At age 40, Nathan's career is also in serious question, but he said he will rehab with the intention of a comeback attempt.
"Already back in there doing some exercises," Nathan said.
Given the procedure, Nathan said he's unlikely to pick up a ball for eight months, which puts the start of next season likely out of range for him. Still, he wants to give it a shot. Most likely, Nathan will be able to pick his spot as a free agent, as his two-year contract with the Tigers will expire after this season. Detroit holds a $10 million option for 2016, which it can buy out for $1 million.
Jason Beck is a reporter for MLB.com. Read Beck's Blog and follow him on Twitter @beckjason. This story was not subject to the approval of Major League Baseball or its clubs.