Sean Manaea: Dr. Bronx and Mr. Fenway

Photo by Mike Stobe/Getty ImagesIt’s a strange case indeed. Two ballparks, both alike in everything from classic fame to absurd dimensions to daunting home tenants, and Oakland A’s pitcher Sean Manaea has been an entirely different performer at each of them.

Manaea is having an excellent season so far. After years of shoulder issues, he’s got his velocity back and is looking like the All-Star-caliber starter we’d hoped for when he was acquired as a top prospect. Among his sparkling results, he’s thrown two shutouts in 15 appearances.

Also among those 15 outings have been visits to Yankee Stadium and Fenway Park. Throughout his career, regardless of how else he’s been faring each year, his…