The Pirates received Brethowr from the Cubs in exchange for Taylor Rogers on Thursday, Stephen J. Nesbitt of The Athletic reports.
Brethowr hit for just a .527 OPS in his first season in the minors with Single-A Myrtle Beach last year. He's followed that up with .700 OPS this season for High-A South Bend. If the outfielder stays at the High-A level for the Pirates, he will join High-A Greensboro.