PORT ST. LUCIE — And this little piggy went wee, wee, wee, all the way to the X-ray machine.

Seth Lugo became the first Mets player this spring sidelined by injury, after sustaining a fracture to his left pinkie toe, manager Luis Rojas said Tuesday. The injury occurred away from the ballpark, with the pitcher stubbing the toe in his hotel room.

“It’s a small fracture, no major concern,” Rojas said at Clover Park.

Lugo was fitted with padding in his left shoe — his landing foot — and tested it walking around the complex during Tuesday’s workouts. He is expected to miss three days of throwing, leaving him unavailable for the start of the Grapefruit League season Saturday. Lugo will need to throw live batting practice before appearing in an exhibition game.

Rojas indicated he likely will spend spring training experimenting with different options before deciding on a leadoff hitter. Brandon Nimmo and Jeff McNeil handled most of the leadoff duties last season.

“We have guys that hit leadoff before and did a really good job,” Rojas said. “The history there, like McNeil, Nimmo. They are guys that get on base and there’s more guys as well that can do it. Pete [Alonso] hit second and was successful in the lineup. There’s a lot of things involved in making a lineup.”

Edwin Diaz’s first live batting practice session brought rave reviews. “Just electric stuff,” Rojas said. “I thought he was maybe falling off a little bit, but the stuff was unbelievable, just ride and run and sail on his fastball.

“It was a good first day. The guys were talking about how good his stuff is, so he was amped up and it was a good day for him.”