Johnson had two assists, five blocks and four penalty minutes over 15:50 of ice time in Thursday's 5-4 overtime win over the Stars.
He had a hand in Nathan MacKinnon's first-period tally, then Johnson's third-period shot was deflected in by Jonathan Drouin to cut Dallas' lead to 4-3. It was the second two-point night of the season for the 36-year-old Johnson, who was nine points through 39 games overall.