Hockey fans are trying to figure out who made inflammatory remarks about Calgary Flames' defenceman Dougie Hamilton during a Hockey Night in Canada broadcast Saturday night.

"If you don't rip Dougie Hamilton, I will. Stupidest f**king penalty you can take," someone could be heard saying over the microphone from the broadcast booth.

"Does he have a f**king brain? He doesn't. He's stupid as f**k."

The Calgary Flames lost to the Anaheim Ducks 3-2 in Game 2 of their first round playoff series on Saturday night.

The comments about the defenceman appear to have been made after the game ended by someone who was part of the broadcasting crew.

Andrew Bucholtz, writing for the Awful Announcing sports blog, lays out some theories.

"Voice two appears to be colour analyst John Garrett," Bucholtz speculated, referring to the second broadcaster interacting with the man who dropped all the F-bombs.

"It's only the first voice that does, and his identity isn't clear. Some might think it's play-by-play man Rick Ball, who was working the game with Garrett, but it doesn't really sound like him."

There's a lively debate on a Calgary Flames Reddit thread with many also concluding that it's not Rick Ball.

CBC News reached out to Sportsnet for comment but received no reply.