The Twins announced this morning that they’ve selected the contract of right-hander Randy Dobnak. In a corresponding move, right-hander Diego Castillo was designated for assignment.
Dobnak, 29, signed an ill-fated extension with the Twins prior to the 2021 season on the heels of a 2020 campaign where he showed promise as a potential mid-rotation starter with a 4.05 ERA and 3.96 FIP through ten starts. After a strong rookie campaign in 2019, that gave Dobnak a career 3.12 ERA and 3.56 FIP across 75 innings of work in the majors at the time of the deal. Unfortunately, things quickly went off the rails for the right-hander as he surrendered a ghastly 7.64 ERA in 50 2/3 innings of work during the first year of his extension. Those lackluster results led to the club outrighting him off the 40-man roster in September of 2022.
Since then, Dobnak has remained in the Twins organization while primarily pitching at Triple-A. He’s done fairly well for himself in the minors this year, with a 4.25 ERA in 133 1/3 innings of work that earned him another look at the big league level. That stint back in the majors earlier this year didn’t go over very well, however, as Dobnak surrendered a 5.87 ERA in 7 2/3 frames before being shipped back to the minors. He’ll now finish the season in the Twins bullpen and on the 40-man roster. He remains under contract with the club through the end of the 2025 season, and does not yet have enough service time to reject an outright assignment without also forfeiting the remainder of his contract.
Making room for Dobnak on the club’s 40-man roster is Castillo, who signed with Minnesota on a minor league deal over the offseason and was first selected to the roster at the end of May. Since then, he’s posted a solid enough 2.70 ERA in 10 innings of work but hasn’t been able to stick on the Twins roster due to shaky peripherals, including more walks (eight) than strikeouts (six) in the majors. When at Triple-A with the Twins this year, Castillo has struggled badly with a 5.59 ERA in 40 appearances.
Despite those deep struggles, however, it’s not impossible to imagine the right-hander continuing to draw attention from clubs as a minor league depth option this winter. After all, Castillo excelled with the Rays and Mariners earlier in his career with a 3.12 ERA and 3.69 FIP in 250 appearances from 2018 to 2022. Any club that believes they can unlock that form in Castillo will surely have interest in bringing him into the fold and seeing what he has next spring. Of course, before Castillo can officially reach free agency he’ll need to clear waivers sometime in the next week.