An $85,000 signing from Harvard, Rosenblum-Larson had an excellent pro debut. Working out of the bullpen for short-season Hudson Valley and low Class A Bowling Green, Rosenblum-Larson posted a sparkling 62-9 K-BB mark in 38.2 innings with a 1.16 ERA. He’s a low-slot righthander who drops down to a low three-quarter, near sidearm angle, giving hitters an uncomfortable look with his low-90s fastball and a solid slider.
Highest riser: Hernandez
Hernandez began 2018 as the Rays’ No. 20 prospect, but was up to No. 7 by the end of the season.