He spent the next few seasons with the White Sox, becoming their regular second baseman. In 1984, Law hit 17 home runs, the most homers he'd ever hit in one season in the majors. Law would be on the move again, this time traded to the Montreal Expos in exchange for pitcher Bob James.
After spending several seasons with the White Sox as their starting second baseman, Law had his best season at bat in 1984, hitting 17 home runs.  He was later traded to the Montreal Expos in a deal that involved pitcher Bob James.