OK, same rules I used for the hitters for the pitchers.
Sleeper: Yorman Galindez
It was June of 2024. Yorman Galindez was climbing the Brewers' prospect ranks while mowing down a higher rate of batters in the Carolina League than current top-100 prospects Jarlin Susana and Elmer Rodriguez. A promotion to Wisconsin seemed to be likely, even with an elevated walk rate.
Then he got hurt and hasn't pitched in a regular season game since.
Now Galindez is back, starting games in minor league spring training. However he seems to have lost a bit of hype, between the injury and the glut of interesting arms the Brewers have at Wisconsin and Carolina this year. I think Galindez is a good bet to reclaim his ascending status this season while pushing his way up the prospect ranks.
Deep Sleeper: Carlos Carra
It feels weird putting Carra at this level because, well, his resume through two pro seasons should be generating more hype than it has. I guess, to some degree, you can chalk this up to bad timing.
He was a late signee in the 2024 class, inking in April of that year out of Mexico. He was part of a DSL group that outside of Wande Torres and Wenderlyn King all had their statistical warts (Argenis Aparicio, Ayendy Bravo, Saul Sanchez, and Manuel Moreno posted lower K rates, Enderson Mercado seemingly let everyone who reached base against him score, etc.). For Carra, it was an elevated walk rate. He did strike out more than 11 per 9 innings and posted an only in the DSL rate of infield fly balls (Almost a 60% flyball rate, 46.4% of which Fangraphs has listed as pop-ups).
Then he wasn't one of the DSL arms brought over for spring training (that honor went to Mercado and Miqueas Mercedes). Him being 18 years old in the ACL might have been noteworthy on some teams. It really wasn't on the Brewers. Even striking out more than a batter per inning (which only 13 pitchers ages 18 or younger with at 20 innings pitched did in either Complex League) only placed him third on that list among Brewers (behind Mercado and Ethan Dorchies). Be one of only 18 pitchers in their age 18 or younger season to throw 10 innings in full-season ball? Well, not as notable when fully 1/3 of those were Brewers prospects.
All this is to say, I think he's been overlooked (outside of @Spencer Michaelis and @Joseph Zarr's podcast; amazing work once again, guys). This is especially true given that he turned his biggest DSL weakness into a strength, walking barely over 2 batters per 9 on the season and only issuing one walk in his 11 A ball innings.
Really Deep Sleeper: Michael Fowler
Usually this is where I'd pick some DSL pitcher with good peripherals but a mediocre to lousy ERA. Raymond Sarmiento didn't quite fit as well as Mercado and Daniel Corniel did in previous years, though. Instead, I am bending my rules a little bit for this choice. Fowler was kind of a combo indy ball and UDFA signing this past year.
After 8 1/3 A-ball innings and 1 triple-A cameo, the Brewers first assigned him to the Arizona Fall League and then the Spring Breakout roster. It isn't unprecedented for an UDFA to get on the spring breakout roster the following season (see Hostetler, Jack), it is noteworthy that the Brewers think enough of him to give him those assignments. Not bad for a guy who never posted an ERA below 6.80 in college.