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The 23-year-old Eiberson Castellano had a phenomenal 2024 season, wherein he posted a 3.40 FIP and a 24.6% strikeout minus walk rate between High-A Jersey Shore and Double-A Reading. Although he’s likely to work as a long man out of the bullpen if he stays with the Twins, 20 of his 22 appearances were starts last year.
While he was great, the Phillies weren't completely off their rocker in not protecting the 2018 international signee. Not only did it take him more than three years to throw his first professional pitch in the States, but his results varied greatly in the seasons leading up to 2024, as he bounced back and forth between being a reliever and a starter. Now, as the Twins begin spring training, the 6-foot-3 hurler will look to show why he was “one of the more intriguing arms in the draft,” according to Geoff Pontes of Baseball America.
In a podcast series doing a deep dive into each farm system, Pontes and JJ Cooper named Castellano a “non-top-10 prospect to watch” for the Minnesota Twins.
“I think that there's a chance that this guy could be actually a useful long-term pitcher for the Twins,” Pontes said.
It's not often that you can pluck a healthy starter with plus stuff (coming off a great season) in the Rule 5 Draft, and the Twins would be remiss to let this opportunity go to waste even if Castellano falters during spring training. In addition to working out of the bullpen, the Venezuelan (wait, a Venezuelan pitcher acquired via the Rule 5 Draft - sound familiar?) has the ability to make spot starts as needed or piggyback with Simeon Woods Richardson at times.
For the Twins, there's indirect value in rostering a swingman who could reduce the pressure on David Festa and Zebby Matthews to make spot starts with the Twins, allowing them to really hone their craft in St. Paul instead until a larger opportunity opens up in the big-league rotation. For what it's worth, PECOTA projects an ERA north of 4.00 and a 12.4% strikeout-minus-walk rate. This would make him a slightly below-average pitcher, but relatively speaking, those are solid numbers for the role he’d be in with the Twins.
Looking past 2025, Castellano represents depth at a position where you can never have enough of it. While the Twins have developed one of the best pitching pipelines in baseball and control their top arms for the foreseeable future, it's not out of the question for Castellano to move into the back end of the rotation somewhere down the line.
Organizational floors are set by the performance of their star players, but how far they can go beyond their floor relies on role players and depth. Castellano’s potential contributions (along with other role players) could help this team go from competitive to contender—or from contender to honest-to-God winner. Players of his type can be invaluable to an organization, especially as a pitcher, and it's time we start looking at Castellano as such.







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