John Curtiss: Everything you need to know

The Diamondbacks released Curtiss on Friday. After making 30 appearances out of the Arizona bullpen in 2025, Curtiss was outrighted off the Diamondbacks' 40-man roster in November and ended up re-signing with the organization on a minor-league deal. He failed to win a spot in Arizona's Opening Day bullpen and hadn't made a case for a promotion while pitching at Triple-A Reno, where he posted a 4.02 ERA, 1.32 WHIP and 13:6 K:BB across 15.2 innings over 12 appearances. Now a free agent, the veteran right-hander will look to catch on elsewhere.

The Diamondbacks reassigned Curtiss to minor-league camp Sunday, Alex Weiner of ArizonaSports.com reports. Curtiss appears set to begin the season in the bullpen at Triple-A Reno after he was touched up for three earned runs on five hits and two walks over 5.2 innings in Cactus League play. The 32-year-old righty could earn another look in the majors at some point in 2026 if he can rediscover the form he displayed last season across his two stints with Arizona. He collected four holds and accrued a 3.93 ERA, 0.93 WHIP and 24:5 K:BB in 36.2 innings out of the Diamondbacks bullpen in 2025.

The Diamondbacks re-signed Curtiss to a minor-league contract Tuesday. Curtiss had chosen free agency after being booted off Arizona's 40-man roster last month, but he's now back in the organization on a new deal. The 32-year-old pitched well in 30 relief outings for the Diamondbacks in 2025, collecting a 3.93 ERA, 0.93 WHIP and 24:5 K:BB over 36.2. Curtiss is likely headed to Triple-A Reno to begin the 2026 season.