Mariners reliever David Phelps underwent successful surgery Monday to repair a bone spur in his elbow, reports Ryan Divish of the Seattle Times. Phelps is expected to recover within six to eight weeks, and will proceed with a "normal" throwing program this winter, says Divish.
Seattle acquired Phelps from the Marlins ahead of the trade deadline in exchange for a prospect package headlined by outfielder Brayan Hernandez. However, Phelps only made ten appearances out of the pen for the Mariners before landing permanently on the disabled list on August 30. The right-hander is indeed under team control through 2018, and should see plenty of high-leverage innings next season.
Phelps, 25, has blossomed into a solid setup man over the last two seasons, including a stellar 2.28 ERA with 25 holds in 2016 with the Marlins. The Notre Dame alumnus finished 2017 with 3.40 ERA and 10.0 K/9 across 55.2 innings. Despite elevated strikeout numbers in recent seasons, Phelps has seen his walk rates rise accordingly; his 4.2 BB/9 this season were a career-worst.
Phelps is set for his fourth and final year of salary arbitration this winter, and will enter free agency after the 2018 season.