Lawrence was recalled from Triple-A Tacoma on Wednesday.
Lawrence will take the roster spot of Chase De Jong, who was sent back to Tacoma after struggling as a starter. Lawrence saw some time in the majors with the Blue Jays earlier in the year, though he stumbled to a 8.78 ERA through four appearances (13.1 innings). Lawrence will be available out of the bullpen for the time being, though he also remains an option to start in place of De Jong on Sunday against the White Sox.