Single-A Lake Elsinore placed Fountain on the full-season injured list May 29 after he had surgery to repair a separated shoulder, J.J. Cooper of Baseball America reports.
Fountain, who received an over-slot $1.7 million bonus after the Padres selected him in the fifth round of the 2024 First-Year Player Draft, is already 20 years old and has a career .191/.303/.281 slash line in 48 career games at Single-A. He will miss the rest of the season.