As the 2025 MLB season approaches its midpoint, fantasy managers are buzzing about the latest crop of prospects making their major league debuts. With injuries and performance struggles afflicting many teams, organizations are turning to their minor league systems for fresh talent to bolster their rosters.

Jac Caglianone, first baseman for the Kansas City Royals, is making headlines after a dominant minor league campaign, hitting .322 with 15 homers. He’s expected to get significant playing time as a right fielder. Cole Young, now with the Seattle Mariners, is also a name to watch after a solid stint in Triple-A, offering potential at second base. Meanwhile, the Boston Red Sox have called up Marcelo Mayer, whose impressive minor league stats suggest significant upside despite a slow start at the big league level.