New York Mets right-hander Kodai Senga, the major league ERA leader, was diagnosed with a Grade 1 strain of his right hamstring, hours after he was placed on the 15-day injured list.

New York Mets right-hander Kodai Senga was placed on the injured list on Friday after he exited Thursday's win against the Washington Nationals in the sixth inning after straining

While Friday's MRI showed "relatively good news" on right-hander Kodai Senga's hamstring strain, the major league leader in ERA still is set to miss at least a month, manager Carlos Mendoza indicated.

Nationals drop their fifth straight, 4-3, after late rally falls short. They’re 2-8 since the calendar flipped to June.

It was a travel day Thursday for the Rays while the Mets were in action completing a series sweep of the Washington Nationals. Jeff McNeil went yard for the seventh time this season to pace the attack against the Nats. The Mets are now 27-7 at Citi Field.

Chad Whitson snapped at Carlos Mendoza during an argument between the two over a called ball in the ninth inning.