Watch: Polak escapes penalty for clear shove through the back of Dumoulin

It's been a fairly civil Stanley Cup Final, but it might not remain that way if this sort of nasty is permitted.

San Jose Sharks defenseman Roman Polak escaped penalty after a clear, and outwardly reckless, shove through the back of Brian Dumoulin on a rare venture deep into the offensive zone.

Dumoulin picked himself up unscathed.