Cubs prospects Mason McGwire and Josiah Hartshorn make Futures Game debut alongside White Sox's Bonemer

Chicago Cubs prospects Mason McGwire and Josiah Hartshorn, along with Chicago White Sox prospect Caleb Bonemer, took part in the 2026 All-Star Futures Game on Sunday in Philadelphia. The event gave the trio a chance to compete alongside some of the top minor league talent in baseball, according to the Chicago Tribune.

Chicago TribuneChicago Cubs prospects — and roommates — Mason McGwire and Josiah Hartshorn embrace Futures Game experience

Hartshorn’s path to the Futures Game was especially rapid. Drafted by the Cubs in 2025, he signed for over slot value at $2 million, the Chicago Tribune reported. Just 363 days later, he found himself on the same field as elite prospects from across the sport, marking a swift rise through the organization.

The experience was a surreal moment for the young players, who are also roommates. The Chicago Tribune noted that the game allowed them to reflect on their development and the significance of representing their organizations on a national stage during All-Star weekend.

For the Cubs and White Sox, seeing their prospects get that exposure underscores the strength of their farm systems. McGwire, Hartshorn, and Bonemer each contributed to a game that serves as a showcase for baseball’s next generation, the Chicago Tribune added.