Righty Brad Keller elected free agency after being waived by the Red Sox, tweets Chris Cotillo of MassLive. Boston designated Keller for assignment on Tuesday when they called up Rich Hill.
It’s a repeat of the process that played out two weeks ago. Keller elected free agency on August 13 rather than accept an optional assignment to Triple-A, the right of any player with at least five years of service time. He very quickly re-signed with Boston on a minor league contract and was called back up on Monday. Keller logged four innings of relief that night, allowing five runs on seven hits and a pair of walks. Boston swapped him out for Hill the next day.
The 29-year-old Keller has split this season between the White Sox and Red Sox. He has absorbed 41 1/3 innings over 16 appearances, generally working in low-leverage relief. Opponents have tagged him for a 5.44 ERA behind nearly two home runs per nine innings. Keller’s 16.7% strikeout rate is well below average. He’s getting grounders at a strong 50% clip, but opponents have done a lot of damage when they’ve gotten the ball elevated.
Keller has never had a strong strikeout and walk profile. His calling card has been his ability to keep the ball on the ground. That translated into serviceable back-of-the-rotation numbers for the Royals, for whom he posted a 4.27 ERA over six seasons. Keller’s final season in K.C. was a disaster, as he walked a staggering 21.3% of batters faced. The Royals eventually announced that he’d been diagnosed with thoracic outlet syndrome.
The Sox could again try to bring Keller back on a non-roster deal. He’s had some success this year in Triple-A, combining for a 3.52 ERA over 46 innings between Chicago’s and Boston’s affiliates. Keller has started nine of 12 appearances in the minors and can serve as rotation or long relief depth wherever he lands.