Former MLB All-Star closer and World Series champion Bobby Jenks passed away on Friday after a battle with adenocarcinoma, a form of stomach cancer. He was 44. Jenks disclosed his treatment earlier this year. Former MLB All-Star And World Series Champion Discloses Heartbreaking Diagnosis "Former Chicago White Sox All-Star pitcher and 2005 World Series Champion Bobby Jenks passed away yesterday, July 4, in Sintra, Portugal, where he had been battling adenocarcinoma, a form of stomach cancer. He was 44 years old," the Chicago White Sox announced. Former Chicago White Sox All-Star pitcher and 2005 World Series Champion Bobby Jenks passed away yesterday, July 4, in Sintra, Portugal, where he had been battling adenocarcinoma, a form of stomach cancer. He was 44 years old. pic.twitter.com/KDb3I0KL66 — Chicago White Sox (@whitesox) July 5, 2025 MLB.com shared: In Game 4 of the 2005 World Series against the Astros, Jenks earned the save with a scoreless ninth inning, inducing a game-ending groundout off the bat of Orlando Palmeiro to end an 88-year championship drought. “We have lost an iconic member of the White Sox family today,” said White Sox chairman Jerry Reinsdorf. “None of us will ever forget that ninth inning of Game 4 in Houston, all that Bobby did for the 2005 World Series champions and for the entire Sox organization during his time in Chicago. “He and his family knew cancer would be his toughest battle, and he will be missed as a husband, father, friend, and teammate. He will forever hold a special place in all our hearts.” There are only a few people in the White Sox clubhouse whose careers overlapped with Jenks, but regardless of the amount of time they shared with him, Jenks made a lasting impact. “He was a gamer -- this guy gave you everything he had every single time,” said White Sox hitting coach Marcus Thames, a teammate of Jenks’ from the Arizona Fall League. “I saw him last year. He came to the stadium, and I hadn't seen him in so long, and he gave me one of those big old bear hugs.” "We are deeply saddened by the passing of former Major League pitcher Bobby Jenks. Jenks pitched for the White Sox from 2005 until 2010 and for the Red Sox in 2011. In his time in Chicago, Jenks amassed 173 saves, including back-to-back seasons of 40+ saves in 2006 and 2007. Jenks was named an American League All-Star in both of those seasons," MLB stated on X. "Jenks was on the mound as the White Sox recorded the final out of the 2005 World Series, which finished off the 4-game sweep of the Houston Astros and secured the franchise’s first World Series championship since 1917," it added. We are deeply saddened by the passing of former Major League pitcher Bobby Jenks. Jenks pitched for the White Sox from 2005 until 2010 and for the Red Sox in 2011. In his time in Chicago, Jenks amassed 173 saves, including back-to-back seasons of 40+ saves in 2006 and 2007.… pic.twitter.com/krehQHUvza — MLB (@MLB) July 5, 2025 Watch footage from the 2005 World Series below: Bobby Jenks sealed the final out for the Chicago White Sox in 2005, clinching their first World Series title in 88 years. RIP. pic.twitter.com/JUP4IzrKHM — Robby The Brain© (@RobbyTheBrain) July 5, 2025 More from ESPN: After Jenks moved to Portugal last year, he was diagnosed with a deep vein thrombosis in his right calf. That eventually spread into blood clots in his lungs, prompting further testing. He was later diagnosed with adenocarcinoma and began undergoing radiation. In February, as Jenks was being treated for the illness, the White Sox posted "We stand with you, Bobby" on Instagram, adding in the post that the club was "thinking of Bobby as he is being treated." In 2005, as the White Sox ended an 88-year drought en route to the World Series title, Jenks appeared in six postseason games. Chicago went 11-1 in the playoffs, and he earned saves in series-clinching wins in Game 3 of the ALDS at Boston, and Game 4 of the World Series against the Houston Astros. In 2006, Jenks saved 41 games, and the following year, he posted 40 saves. He also retired 41 consecutive batters in 2007, matching a record for a reliever. Ozzie Guillen, who managed Chicago's World Series-winning squad, had a signature move to summon Jenks from the bullpen, throwing his arms wide open to show that he wanted the 6-foot-4, 275-pound closer. Jenks died weeks before the White Sox were set to hold a 20th anniversary reunion for the franchise's most recent title-winning team.