Arizona Diamondbacks left-hander Blake Walston will undergo season-ending Tommy John surgery. Diamondbacks manager Torey Lovullo tells reporters it's “terrible news,” but Walston is going to "come ...

Diamondbacks manager Torey Lovullo said Friday that Walston will undergo Tommy John surgery, Alex Weiner of ArizonaSports.com reports. It's not clear when Walston was injured, but he missed time ...

Diamondbacks left-hander Blake Walston will undergo Tommy John surgery, manager Torey Lovullo tells Alex Weiner of Arizona ...

SCOTTSDALE, Ariz. — Arizona Diamondbacks left-hander Blake Walston will undergo season-ending Tommy John surgery. Diamondbacks manager Torey Lovullo tells reporters it's "terrible news," but ...

Walston, 23, went 1-0 with a 4.42 ERA in seven appearances for Arizona last season, including two starts. He also was 3-2 with a 4.85 ERA in 13 starts and one relief appearance with Triple-A Reno.