Jimmy Nelson Has Reinvented Himself as a Bullpen Ace
Jimmy Nelson has had a rough few years, facing the most harrowing tribulation of a professional pitcher: persistent injuries. In 2015 and 2016, Nelson tossed 177.1 and 179.1 innings, respectively, with a cumulative ERA of 4.37 and 2.5 WAR. That WAR total over 356.2 innings put him on about a 1.56 WAR per 180 innings pace, about what we might expect from a back-end starter. Given how many innings he was able to shoulder, he was a valuable contributor. The following season, Nelson broke out. He added almost a tick to his fastball and increased the usage of his two breaking balls with great results. He posted a 3.49 ERA in 2017. His strikeout rate increased from 18.5% in his prior two seasons to 27.3% and he trimmed his walk rate by about 33% while maintaining an above average groundball rate of 50.3%. These improvements added up to an astounding 4.8 WAR in 175.1 innings, a massive leap that placed him eighth in baseball among starters.
But the end of the 2017 season marked the start of a string of injuries that kept Nelson off the mound for much of the past three seasons. The first came in September of his superlative 2017. Running the bases following a single against the Cubs, Nelson took a hard turn around first and was forced to dive back to the bag after inducing a throw from the defense. Upon extending his arm to the base, he tore the labrum and rotator cuff in his right arm, comprising his shoulder capsule and incurring nerve damage; the injury kept Nelson out for all of 2018. He returned to the Brewers on June 5, 2019, made four appearances (three of them starts) and suffered an elbow injury that forced him off the mound until September of that same year when he then made six more appearances. In just 22 innings of work, he had a less-than-stellar 6.95 ERA and walked over 16% of the batters he faced. Milwaukee did not tender him a contract that offseason.
The Dodgers signed Nelson that winter, with the intent of rehabilitating someone who was among the most effective pitchers in the majors. But Nelson suffered a back injury in spring training prior to the COVID-19 shutdown, forcing him to have surgery on his back. That injury, according to Nelson himself, was the result of “mechanical compensations that developed over time going back from the shoulder.” He missed all of 2020 but the Dodgers brought him back on a minor-league contract, hoping he could rediscover some of his prior form and fortify a bullpen that lost its second, fifth, and ninth most-used arms, including Jake McGee, who was the team’s most valuable reliever by WAR. Read the rest of this entry »