Chicago White Sox sign veteran pitcher Martin Perez, designate Ron Marinaccio for assignment.

The Chicago White Sox signed left-handed pitcher Martin Perez to a one-year, $5 million contract, adding a veteran starter to their rotation. To make room on the roster, they designated right-handed reliever Ron Marinaccio for assignment. Perez, 33, joins from the Pittsburgh Pirates and San Diego Padres, while Marinaccio, 29, was claimed off waivers from the Yankees in 2024 but did not appear in any games for the Sox.