PORT ST. LUCIE, Fla. — P. J. Conlon is an undersized pitching prospect for the Mets who has yet to get above Class A in the minor leagues. But across the Atlantic Ocean, he is already gaining fame.

The Belfast Telegraph interviewed him in the off-season about his nascent baseball career. Two weekends ago, he appeared on BBC Radio Ulster in Northern Ireland.

“I get people reaching out to me from Ireland through social media and they think it’s really cool,” Conlon said last week.

Conlon, 23, has had only one full season in professional baseball, but he could advance quickly through the Mets’ farm system. Although he is generously listed at 5 feet 11 inches and 190 pounds, and possesses an unusual left-handed delivery that produces a fastball topping out at 90 miles an hour, he was named the Mets’ minor league pitcher of the year in 2016 after going 12-2 with a minuscule 1.65 E.R.A.