Lowry was the Giants' top winner with a 14-8 record last season.
The lefty had trouble throwing strikes this spring and the team
sent him back to the Bay Area to be examined by a hand specialist.
The Giants said Thursday that Lowry was diagnosed with
exertional compartment syndrome. According to MayoClinic.com, it is
"an exercise-induced neuromuscular condition that causes pain,
swelling and sometimes even disability in affected muscles of the
legs or arms" and seems to affect primarily athletes in their 20s.
"The thing we wanted to do was identify the problem and it
looks like we've done that," Giants manager Bruce Bochy said.
"Despite it's not great news, it is good news to have found out
what's going on, what the problem is."
Lowry could resume throwing in two or three weeks, but Bochy
acknowledged the lefty probably won't be available to pitch until
the end of April.
"This is something that I don't know enough about it to know
how rare it is, but you don't hear about it a lot," Bochy said.
"It's not like this is a common occurrence in baseball players."
The 27-year-old Lowry struggled with his control during his
first game at spring training, then walked nine of 12 batters
against Texas on Monday.
Lowry was later diagnosed with tendinitis in his wrist, and went
for a series of tests in San Francisco.
"We're going to sit down and talk about what our options are,"
Information from The Associated Press was used in this report.