Two-time All-Star and 2005 World Series champion Bobby Jenks passed away yesterday, per an announcement from the White Sox. Chicago also released a tribute video alongside the announcement. Jenks passed after a battle with adenocarcinoma, a form of stomach cancer. He was just 44 years old.
Jenks was a fifth-round pick by the Angels in the 2000 draft but was designated for assignment by the Halos before he even made it to the big leagues. He was claimed off the waiver wire by the White Sox and joined the big league bullpen in July of 2005. He scuffled a bit early on, with four runs allowed across his first five appearances in the big leagues, but settled in not long after that and notched his first career save on August 25 when he closed out a ten-inning game against the Twins.
He continued in a late-inning role for those White Sox down the stretch, and finished the regular season with a 2.75 ERA, six saves, and a 29.8% strikeout rate. Jenks’s dominance carried over into the postseason with a 2.25 ERA, four saves, and eight strikeouts in eight playoff innings. The right-hander was on the mound to finish off the club’s four-game sweep of the Astros in the Fall Classic, closing out a 1-0 victory by inducing a groundout from Orlando Palmeiro to emerge from his rookie season as a World Series champion.
He followed up that performance in his first season by pitching his way into an All-Star berth in both 2006 and 2007. He fully settled into the White Sox closer role by that point, with 81 saves across those two campaigns. That dominant 2007 season in particular saw him retire 41 consecutive batters, which was good for an MLB record at the time. By the end of the 2008 campaign, Jenks had a career 3.21 ERA with a 3.27 FIP with 146 saves collected over his time with the Sox. His numbers took a nosedive in 2009, however, as he surrendered a 4.44 ERA in 52 2/3 innings of work. Underlying analytics suggest that Jenks had pitched better than that ERA would suggest given his 2.59 FIP and 26.4% strikeout rate that year, but that wasn’t enough to stop the White Sox from deciding to part ways with him after the season.
Jenks went on to sign with the Red Sox on a two-year, $12MM contract not long after that, but the deal proved to be ill-fated. He struggled with injuries throughout the 2011 season, and posted a 6.32 ERA across the 19 appearances he was healthy enough to get on the mound for. The injuries worsened, and an MRI eventually revealed bone spurs on his spine. He underwent surgery on his back in December of 2011, but complications from that surgery arose after his surgeon left a serrated edge in his back. The effects of that mistake left Jenks bedridden and he ultimately was released by the Red Sox in June of 2012 and retired from baseball at just 31 years old.
Jenks retired from baseball with a career 3.53 ERA, 351 strikeouts, and 173 saves despite having his career cut short after just seven seasons. He returned to baseball as a coach in 2021, serving as pitching coach for the independent Pioneer League’s Grand Junction Rockies that year. He was promoted to manager for 2022 and later served as a coach in the Appalachian League and a manager in the Frontier League, though a cancer diagnosis he announced in February of 2025 forced him to bring his coaching career to a close.
In the wake of today’s news, former teammate A.J. Pierzynski remembered Jenks in a post on social media, while longtime MLB.com White Sox beat writer Scott Merkin shared a conversation he had with Jenks back in February, shortly after his diagnosis. We at MLB Trade Rumors join them and the rest of the baseball world in extending our condolences to Jenks’s family, friends, loved ones, and all of those whose lives he touched during his time in the game.