An Assortment of Reliever Signings, Part One

As expected, the first weekend after the end of the lockout gave us a flurry of moves. Relievers in particular were a hot commodity, with teams trying to bolster their bullpens as the pool of quality pitchers continues to shrink. Let’s take a closer look at a few of these moves from over the weekend.
White Sox Sign Joe Kelly
Kelly comes to Chicago on a two-year, $17 million deal with a club option for a third year. At 33, the veteran is coming off of a great season with the Dodgers, probably his best as a reliever. Underneath his 2.86 ERA, he posted a career-best swinging-strike rate (11.6%) and exit velocity (85.5 mph), as well as his lowest walk rate (8.2%) ever. Even with all the success, a pair of injuries raise questions about his durability moving forward. Kelly got a late start in 2021 because of an offseason surgery to clean up his shoulder, and his year ended with him walking off the mound in the playoffs after suffering a forearm injury. Luckily, he avoided the worst case scenario; all reports have him ready for the upcoming season.
Kelly’s successful 2021 came on the back of a dominant low-spin sinker. In each of the previous five seasons, his four-seam fastball was his most used heater, but after years of middling results with the pitch, he all but shelved it in 2021. A new sinker-heavy pitch mix helped increase his groundball rate over the years; his three primary pitches — sinker, curveball, and changeup — all generate grounders more than 55% of the time. Read the rest of this entry »