White Sox Sign Brad Keller To Minor League Deal

The White Sox announced that they have signed right-hander Brad Keller to a minor league deal. The Excel Sports Management client also receives an invite to major league Spring Training.

The 28-year-old Keller became a free agent for the first time following the 2023 season but didn’t hit the market at a particularly advantageous time. His 2023 season was cut to just 45 1/3 innings due to a shoulder injury and, eventually, a diagnosis of thoracic outlet syndrome. TOS is a particularly difficult issue for pitchers to return from, but it’s notable that there was never an announcement that Keller underwent surgery to correct the issue. If he indeed avoided going under the knife and was able to deal with his symptoms via rest and rehab, that could portend a more optimistic outlook than the common TOS surgery that has derailed many pitching careers.

From 2018-20, Keller logged a 3.50 ERA in Kansas City, going from a long reliever whom the team selected out of the D-backs organization in the Rule 5 Draft to an entrenched member of the Royals rotation. His 2021-23 seasons went in the opposite direction.

Dating back to Opening Day 2021, Keller carries a 5.14 ERA in 318 2/3 innings. His once-strong walk rate has climbed to an untenable 11.5% — including a ghastly 21.3% clip in 2023 while he navigated that shoulder injury and the perhaps related TOS symptoms. Keller limited opponents to a 4.5% barrel rate and 35.7% hard-hit rate through his first three seasons but has seen those marks leap to 8.4% and 42%, respectively, over the past three years. He’s lost about a mile per hour off his fastball as well.

Keller tried to revamp his repertoire in 2023, ditching his four-seamer and scarcely using his sinker while instead deploying a trio of new pitches: cutter, splitter, curveball. That mix didn’t work out, though it’s hard to glean just how effective those pitches may or may not truly be, given the health troubles that were plaguing him. Keller has long had a plus slider, although that pitch’s efficacy took a step back over the past two seasons as well, particularly in 2023 due to an inability to locate the offering.

Suffice it to say, Keller is a project for the White Sox organization. There’s little harm in taking a look on a minor league pact, but it’s been three years and one particularly ominous injury since he was last an effective big league hurler. He’s not likely to break camp with the club but could join veterans like Chad Kuhl and Jake Woodford as an experienced right-handed depth starter to begin the season in Triple-A Charlotte.