MLB 2025: How Red Sox built MLB's best prospect trio

Copy Link

Email

Print

Editor's note: This story originally ran on Feb. 26, 2025. Kristian Campbell signed a $60 million extension with the Red Sox on April, 5, 2025.

FORT MYERS, Fla. -- Inside the batting cages at the Boston Red Sox's spring training complex, where the future of hitting is playing out in real time, the best trio of position prospects in a generation blossomed.

Kristian Campbell, Roman Anthony and Marcelo Mayer have spent hundreds of hours in the building, rotating around its 10 tunnels, though their best work always seems to happen in Cage 4, right inside the main entrance. When they walk through the door, underneath a sign with a Ted Williams quote in big, capital letters --…