SURPRISE, Ariz. -- Rangers ace Yu Darvish left his spring training debut with tightness in his right triceps Thursday after pitching a scoreless first inning against Kansas City.
Darvish gave up a leadoff single to Alcides Escobar before retiring the next three batters he faced. He threw 10 of 12 pitches for strikes before leaving for precautionary reasons.
"I don't really think it's anything to worry about," Darvish said through a translator. "I commanded my pitches. I didn't throw hard. I worked on my location."
A Rangers spokesman said Darvish would be re-evaluated Friday.
"We don't want to risk anything at this point," Texas manager Jeff Banister said. "You want your guys to be completely honest with you with how they're feeling."
An All-Star each of his first three seasons, Darvish was 10-7 with a 3.06 ERA last year before missing most of the final two months with elbow inflammation. He also missed the end of spring training and the start of last season with neck stiffness.
Information from The Associated Press was used in this report.