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Diamondbacks Designate Former All-Star for Assignment Amid Roster Shakeup
After six years, the Arizona Diamondbacks appear poised to part ways with one of their longest-tenured relivers.
The Diamondbacks are designating pitcher Joe Mantiply for assignment, they announced Friday evening amid a roster shakeup that saw fellow bullpen stalwart Kevin Ginkel demoted to the Triple-A Reno Aces.
Mantiply, 34, was an All-Star for Arizona in 2022. Despite his past success, he has endured a nightmarish 2025: in 9 2/3 innings, he has pitched to a 15.83 ERA with eight strikeouts.
The Diamondbacks—seen as a credible playoff threat early in the season, and still just five games back of the St. Louis Cardinals for the National League's third wild card—are 27-29 and have dropped seven of their past 10 games.
We have made the following roster moves: pic.twitter.com/zolS5Vphy1
— Arizona Diamondbacks (@Dbacks) May 30, 2025
Mantiply and Ginkel have both seen Arizona fall, rise and fall again—from 52-110 doormats in 2021 to NL champions in 2023 to this year's apparent also-rans.
The Diamondbacks are scheduled to open a three-game set with the Washington Nationals Friday.
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Patrick Andres is a staff writer on the Breaking and Trending News team at Sports Illustrated. He joined SI in December 2022, having worked for The Blade, Athlon Sports, Fear the Sword and Diamond Digest. Andres has covered everything from zero-attendance Big Ten basketball to a seven-overtime college football game. He is a graduate of Northwestern University's Medill School of Journalism with a double major in history .