Surprisingly, Waldon further reports, Warren underwent Tommy John surgery in September. That fact had not been publicly known. It’s likely he’ll be sidelined for the entirety of the 2020 campaign.
Warren was headed back to the open market regardless of his elbow health, but the procedure shut the door. He had struggled to a 5.34 ERA in 28 2/3 innings with the Friars. Warren turned in a 25:12 K/BB ratio and allowed nine home runs in his lone season in San Diego.