Hitters
Sleeper: Josh Rivera - Took a bit to adjust to pro ball(.176/.246/.314 first 14 pro games), but he turned it on(.346/.404/.577 final 14 games) and was playing like he needed to be in AA. SS defense keeps the floor low enough to be a reachable bar for prospect legitimacy
Keeper: Carter Trice - They slow played his post-draft path by not putting him with an affiliate, but he can really hit, and if he can take to catching at all he's gonna be well worth hanging on to
Weeper: James Triantos - AA is where you start paying the price for a bad approach/swing decisions, and it's also where we may find out he's a LF/DH prospect defensively.
Pitchers
Sleeper: Brandon Birdsell - Look at the K%-BB% leaders among Cubs SP prospects, and it's mostly names you know(Wicks, Horton, Ferris, Brown) and Birdsell right there with them. The velo + control is a really good foundation to work with since through pitch dev or gameplanning they can likely minimize some other imperfections(HR tendencies), or at a minimum be a leverage RP prospect.
Keeper: Jaxon Wiggins - probably a cop out pick, but I think there's a real chance of a near-Horton like breakout now that he's healthy
Weeper: Michael Arias - Kinda insane prospect helium(45+ grade on Fangraphs, 14th on Pipeline) for a guy who can barely keep his BB% below 15 against A-ball hitters