Reaves, who took a hit from the Flames forward earlier in the game, delivered a measure of payback in the final minute of the second period, appearing to catch a vulnerable Hathaway in the head. There was no call on the play.
Reaves was suspended for three games on Feb. 24 for his boarding hit on San Jose Sharks defenceman Matt Tennyson in a Feb. 22 game. Reaves was given a five-minute major penalty and ejected from the contest.
The rugged Blues winger was also ejected from a March 9 game versus the Chicago Blackhawks after receiving a five-minute major penalty for charging defenceman Christan Ehrhoff. Reaves escaped supplementary discipline for the hit.
He has three goals and no assists to go along with a minus-six rating and 57 penalty minutes in 54 games this season.