Lewis scored an empty-net goal on four shots and went plus-2 in Tuesday's 5-2 win over the Blackhawks.
Lewis scored on a long-range shot at 18:39 of the third period to pad the Flames' lead after a closely contested game. The 34-year-old has deposited a pair of empty-netters in the last three contests. He's at four points, 33 shots, 47 hits and a plus-3 rating through 20 appearances.