The Red Sox have re-signed right-hander Brad Keller to a minor league deal, per Chris Hatfield of SoxProspects.com on X. The veteran elected free agency earlier today but has quickly returned to Boston on a non-roster pact.
Keller, 29, is a veteran with more than five years of service time. That gives him the right to reject optional assignments to the minor leagues. Earlier in the year, he did consent to be optioned by Boston, getting recalled a few days ago. The Sox optioned him a second time but he decided to exercise his right to explore the open market. It seems he didn’t find much to his liking and quickly reunited with the Sox on this minor league deal.
The righty had a nice run with the Royals earlier in his career but he has hit a few bumps in more recent seasons. In the 2018-2020 seasons, Keller logged 360 1/3 innings with Kansas City, allowing 3.50 earned runs per nine in that stretch. His 16.8% strikeout rate was below par but his 9.1% walk rate was around average and his 52.1% ground ball rate was quite strong.
But his ERA crept north of 5.00 in both 2021 and 2022. Last year, he was only able to make 11 appearances before requiring surgery to address thoracic outlet syndrome. This year, he has split his time between the White Sox and the Red Sox, tossing 37 1/3 innings with a 5.30 ERA, 17.8% strikeout rate, 7.7% walk rate and 49.6% ground ball rate.
The Sox bolstered their rotation prior to the deadline by acquiring James Paxton from the Dodgers but he recently suffered a torn calf after just three appearances with Boston. Cooper Criswell is currently on the injured list with COVID but the club is planning on slotting him into the rotation when he’s healthy. Whenever that happens, he’ll join Tanner Houck, Brayan Bello, Nick Pivetta and Kutter Crawford.
The club has Quinn Priester on the 40-man roster as depth but he has allowed 11 earned runs in 6 1/3 Triple-A innings since being acquired from the Pirates. Wikelman Gonzalez is also on the 40-man but he has a 5.93 ERA at Double-A this year and would have to skip Triple-A completely to help the big league club at this point. The club has Naoyuki Uwasawa and Jason Alexander on hand as non-roster depth but Keller has far more major league experience than those two and could be ahead of them in line to get the call whenever a fresh arm is needed next.