Phelps was shifted to the 60-day disabled list Monday.

EDGE Analysis

This is a tough break for Phelps and the Mariners, as the reliever has officially been shut down for the season due to a right elbow impingement. Phelps had a 3.40 ERA and 62:26 K:BB in 55.2 innings between the Marlins and Mariners this season. With Phelps out, Nick Vincent, Emilio Pagan and James Pazos will serve as the main setup men for Edwin Diaz down the stretch. The move opens up a spot on the 40-man roster for Seth Frankoff, who was claimed off waivers from the Cubs on Monday.