Corey Kluber left his start against the Toronto Blue Jays on Tuesday night after just three innings with right shoulder tightness.

Kluber received a routine physical exam Tuesday night, and he will be further evaluated Wednesday.

"There is always concern when a starting pitcher comes out like that," Aaron Boone said. "His physical exam was pretty good tonight. Hopefully, we'll get some answers tomorrow, but it was just something he couldn't work through."

The New York Yankees right-hander was pitching on five days' rest after tossing a no-hitter last week at the Texas Rangers, said his arm felt "kind of heavy."