Arizona Diamondbacks manager Torey Lovullo revealed a devastating health update for Blake Walston on Friday. The left-hander will undergo Tommy John surgery and is expected to miss about 14 months. Walston last pitched in Las Vegas on March 9,

Arizona Diamondbacks left-hander Blake Walston will undergo season-ending Tommy John surgery. Diamondbacks manager Torey Lovullo made the announcement to reporters on Friday. Walston, 23, went 1-0 with a 4.

The Diamondbacks are facing a major setback in their rotation as they gear up for the 2025 MLB season. Their standout prospect, Blake Walston, is set to undergo the dreaded Tommy John surgery, leaving a gaping hole in Arizona's future plans.