While the Capitals haven’t been happy about the discrepancy in penalties dished out in this series, they know that they could have avoided some of the calls they received in Game 6. Of the five minors Washington was whistled for before the final buzzer – a melee broke out at the end of regulation that resulted in two players on both sides receiving roughing penalties – two were pure retaliation. The Capitals were off to a rather solid start when Jack Hillen went off for roughing at 10:01 of the first period – he shoved Ryan Callahan twice after the Rangers’ captain elbowed him. Then in the third period they were trying to mount a comeback when Mike Green cross checked Derek Dorsett in the face after the New York forward slew-footed him. As frustrated as the Capitals can be at any moment, those are avoidable penalties. “The ref made proper calls on a bunch of penalties where we did retaliate,” Troy Brouwer said. “He’s gonna make those calls every time.” Discipline was a major issue for the Capitals early on this year. Washington averaged 4.2 minor penalties and 3.9 penalty kills per game in the first half of the regular season. In the second half those numbers dropped to 3.4 and 3.0, respectively. It was a concern in Game 3, when the Capitals took six minors within the first 29 minutes of the game. For as familiar as Washington is with the perils of frequent trips to the penalty box, it doesn’t hurt to be reminded about it again, Matt Hendricks said.