New York Mets right-hander Kodai Senga experienced arm fatigue after throwing a side session during spring training and is undergoing tests.

"We'll see [about an MRI]," Carlos Mendoza said. "We've got to get with the trainers. ... I've got to get more information. But he got on the mound yesterday and today he came in and just overall arm fatigue."

The Mets are hoping Senga will help anchor their starting rotation.