4. Denyi Reyes
Signed in 2014, Denyi Reyes was an afterthought of the Red Sox international signing class in a year in which they signed highly touted guys such as Rusney Castillo and Yoan Moncada. Fast forward five years later and Reyes will likely make the biggest impact of the three, with Moncada in Chicago after being traded for Chris Sale and Rusney Castillo seemingly being stuck in the minors forever.
After an incredible 2018 season, Reyes moved up on the Red Sox prospect rankings, currently sitting at 19. In 155.2 innings, he struck out 145 batters and walked just 19. Due to a lack of velocity, Reyes relies on pinpoint control to get batters out and it seems it works. His breakout even led the Red Sox to protect him in the rule 5 draft, which really shows how highly the front office views him.
While it is difficult to envision him cracking the majors this year, considering he finished last season at High-A, he is definitely someone to keep an eye on. So far this spring, he has thrown one scoreless inning against the Twins. Reyes could potentially be a high riser if he continues his domination of the lower minors, and hopefully, he will get to throw a bunch of innings this spring. The lower velocity likely plays better as a starter than a reliever.