Rats.

No, no one in the Mets dugout was upset over their 8-0 win Friday at Fenway Park. They were upset about the actual rats in the dugout.

The furry visitor – the sort New York City-dwelling fans will be familiar with – showed up in the visitors’ dugout in the third inning, sending some of the Mets up onto the railing to get away.

Catcher Jose Lobaton bravely grabbed his bat and went searching for the little fella, who could be seen scurrying around on the field during the game, including running along the backstop as Noah Syndergaard delivered a pitch.

We have a rat problem in the Mets dugout pic.twitter.com/5Wi6TOfdZ5

— Red Sox Stats (@redsoxstats) September 15, 2018

#Ratwatchpic.twitter.com/ZfqGL9HUVN

— Sports Illustrated (@SInow) September 15, 2018

Syndergaard, who went seven scoreless and allowed just three hits in a gem of a start, was unfazed by the circumstances – the rat and making his first career appearance under the bright lights of Fenway.

“So … Fenway was a surreal ballpark to pitch in … from a childhood dream perspective,” Syndergaard wrote on Twitter after the game. “As visiting pitcher on a team and city I love … #dontfreakout … and NYC rats are way bigger and meaner.”

And if it takes a rat running around the dugout for an 8-0 win over first-place Boston, the Mets will probably take it at this point.