The Chicago White Sox have added Martín Pérez to their rotation, agreeing to a one-year contract with the veteran left-hander, according to a person with direct knowledge of the negotiations.

Free-agent left-hander Martin Perez and the Chicago White Sox agreed to an undisclosed deal on Wednesday, pending a physical, according to sources familiar with the deal. The White Sox have most likely given Perez just a one-year deal.

The White Sox are set to add a proven arm to their staff, having agreed to a deal on Wednesday with veteran left-hander Martín Pérez, a source told MLB.com's Mark Feinsand. The club has not confirmed the deal,

The Chicago White Sox made a decisive move Tuesday, designating relief pitcher Ron Marinaccio for assignment to officially make space for the newly signed Martín Pérez. Marinaccio, a 29-year-old righty who joined the White Sox off waivers from the Yankees in late September,

The White Sox announced that right-hander Ron Marinaccio has been designated for assignment. That’s the corresponding move for left-hander Martín Pérez, whose one-year deal has now been officially announced.

The Chicago White Sox have added Martin Pérez to their rotation, agreeing to a one-year contract with the veteran left-hander, according to a person with direct knowledge of the negotiations