Brash underwent Tommy John surgery on Wednesday, Ryan Divish of The Seattle Times reports.

The Mariners transferred Brash (elbow) to the 60-day injured list Wednesday.

Brash has been shut down after having a setback with his right elbow while playing catch Friday, Shannon Drayer of Seattle Sports 710 AM reports.

Brash (elbow) will pitch once more at the Mariners' complex in Peoria in coming days before a rehab assignment start date is determined, Ryan Divish of The Seattle Times reports.

Brash (elbow) is set to throw another live batting practice over the weekend and will then head out on a rehab assignment with Triple-A Tacoma, SeattleSports.com reports.

Brash (elbow) recently threw a live batting practice session in Arizona that went "very well," per manager Scott Servais, Ryan Divish of The Seattle Times reports.

Brash (elbow) threw sliders in a bullpen session Monday, Shannon Drayer of Seattle Sports 710 AM reports.

The Mariners placed Brash (elbow) on the 15-day injured list Thursday.

Brash (elbow) threw a bullpen session Wednesday, Daniel Kramer of MLB.com reports.

Brash (elbow) will play catch out to 90 feet Sunday, Ryan Divish of The Seattle Times reports.