At 6:11 of the second period in the Blues/Avalanche game, St. Louis requested a Coach's Challenge to review whether the puck left the attacking zone prior to Tyson Barrie's goal.

After NHL Hockey Operations staff reviewed all available replays and consulted with the Linesman, it was determined there were no definitive replays which showed that the puck left the attacking zone. Therefore, the call on the ice was upheld - good goal Colorado Avalanche.
Since the Coach's Challenge did not result in the original call being overturned, the St. Louis Blues are assessed a minor penalty for delaying the game.