Arizona Diamondbacks right-hander Drey Jameson will undergo Tommy John surgery, which will almost certainly keep the pitcher out of action until Opening Day 2025.

Jameson, 26, has been on the injured list since early July due to elbow problems.

He was the 34th overall pick by Arizona in 2019.

Jameson made his Major League debut with four starts and a 1.48 ERA over 24 1/3 innings in 2022, and then battled for a starter's job this spring before opening this season in Arizona's bullpen.