Minutes after his team was knocked out of the NHL playoffs in a game that included two disallowed goals because of goaltender interference, Jon Cooper was careful to say those calls weren’t the reason the Tampa Bay Lightning lost the series. He still had a problem with them.

Cooper, a two-time Stanley Cup-winning coach, pointed out the league has made one rule change after another to encourage offense. When Tampa Bay scored its first goal, Florida coach Paul Maurice successfully challenged to wipe it out for goalie interference; when on-ice officials ruled a later Lightning goal should not count for the same reason, Cooper challenged but the call was upheld. His team went on to lose 6-1 and he said afterward he didn’t think there was enough evidence for either call.

It was clear this was the biggest controversy of the postseason so far.