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.

The 33-year-old played for Pittsburgh and San Diego last season, going 5-6 with a 4.53 ERA in 26 starts. He is 90-87 with a 4.44 ERA in 314 major league appearances, including 269 starts.

The Red Sox are looking to protect their investment as they try to sign Garrett Crochet to a long-term deal after offseason trade.

The Red Sox acquired Garrett Crochet knowing they wanted to extend him. Initial efforts to that end have begun.

The Red Sox made one of the biggest trade acquisitions of the winter, landing Garrett Crochet from the White Sox for four prospects. Boston apparently has interest in keeping their newly-acquired southpaw for the longer term.