Jonathan Holder

Holder had just one appearance above the High-A level before 2016, but he shot up through the organizational ranks so quickly that he made the Opening Day roster out of the bullpen in 2017. The righty continued to flash the impressive command that helped propel his stock so quickly, maintaining 9.2 K/9 versus just 1.8 BB/9 over 39.1 innings in the big leagues. The 24-year-old was also able to mostly overcome a high BABIP of .361 to post a respectable 3.89 ERA. Despite the solid peripheral numbers, the righty spent most of the second-half of the season in the minors and was left off the club's postseason roster, so a spot in the Opening Day bullpen again is not assured. Still, Holder figures to get a real chance in spring training and could gather the occasional hold if he does stick around in the majors.

Holder shot all the way up through the organizational ranks in 2016, making stops at High-A, Double-A, and Triple-A before earning a September callup. Though he had just one appearance above High-A before this year, he compiled a combined 1.65 ERA with 101 strikeouts against just seven walks in 65.1 innings across the three minor league levels and continued to get better at each progressive stop until reaching the majors. His terrific K:BB obviously demonstrates impressive command, but Holder doesn't have particularly overpowering stuff and was not previously projected as one of the team's most highly-touted prospects, so it's possible there will be some regression next year. Though the righty struggled some in September in the majors, his stellar minor league season and placement on the 40-man roster will likely put him in prime position to win a bullpen spot in spring training.