Drey Jameson: Everything you need to know

The Diamondbacks optioned Jameson to Triple-A Reno on Sunday, Alex Weiner of ArizonaSports.com reports. After being limited to 17 total innings between three levels during the 2025 season while contending with elbow problems, Jameson has been healthy for spring training but didn't pitch well enough to win a spot in Arizona's Opening Day bullpen. He'll head to Reno after turning in an 8.44 ERA, 2.44 WHIP and 5:5 K:BB in 5.1 innings over five Cactus League appearances.

Jameson (elbow) tossed a scoreless inning of relief Tuesday during an appearance in the Arizona Fall League. After missing the entire 2024 campaign while recovering from Tommy John surgery, Jameson was back to full health for the start of spring training, but he made just three appearances for Arizona and 16 in the minors before being shut down in late June when he developed a bone fragment chip in his surgically repaired elbow. Though Jameson didn't return to action before the end of the minor-league season, he avoided another procedure on his elbow and looks like he'll be in line for a normal offseason following a stellar relief appearance Tuesday. Jameson needed only eight pitches to retire the side, generating three groundballs while sporting a fastball that topped out at 99.4 miles per hour. Jameson, who maintains a spot on Arizona's 40-man roster, is expected to compete for a bullpen role with the big club this spring.

Diamondbacks manager Torey Lovullo said Sunday that Jameson was pulled off his rehab assignment in the rookie-level Arizona Complex League last week due to a bone fragment chip in his right elbow, Alex Weiner of ArizonaSports.com reports. Placed on Triple-A Reno's 7-day injured list May 20 due to a lateral right elbow injury, Jameson was cleared to pitch in ACL games in late June but made just two appearances before experiencing tightness in his pitching arm. Fortunately for Jameson, Lovullo relayed that the bone chip in the 28-year-old's elbow isn't expected to require surgery. A timeline for Jameson's return to the mound hasn't been established, however, and given that the righty previously underwent Tommy John surgery in September 2023, Arizona will likely tread carefully with his rehab program.