Ducks coach Bruce Boudreau made his most crucial decision before Saturday’s Game 4 of the NHL’s Western Conference second-round series.

Boudreau put himself in the hot seat by starting 20-year-old rookie goaltender John Gibson. It was a bold move to make mid-playoffs, but Boudreau had already started two other goaltenders in the series. He had one goalie who hasn’t won at Staples Center in Jonas Hiller and another who was injured in Frederik Andersen.

Some playoff debut, kid. Gibson was flawless in goal, making 28 saves and led the Ducks to a 2-0 shutout win over the Kings at Staples Center.

The best-of-7 playoff series is now tied at 2-2.

He could’ve been the goat, but Boudreau looked like a genius after Gibson’s impressive performance.

“Whether that’s unorthodox or orthodox or whatever, that’s just the way my head works,” Boudreau said. “When we call up guys and put them into the lineup, you’ve seen how (Sami) Vatanen has done and anybody, their adrenaline is so high that you know they’re going to be really good. In two weeks, you might come back down to earth, but I knew he would be good (Saturday).”

The playoffs are supposed to be about riding the momentum of a good goaltender deep in the playoffs, but with the Ducks these days, one must ask, “Who’s in goal?”

It seemed natural Gibson would get the call for Game 5 Monday in Anaheim, but Boudreau still had fun with it.

“Gosh, I don’t know,” Boudreau joked. “We’ve still got (Igor) Bobkov we haven’t used.”

It’s all chuckles and laughs now, but with the Ducks down 0-2 after Games 1 and 2 in Anaheim, goaltending was no laughing matter.

The Kings even had a change in goal after the first period Satufday, if you can believe that.

The Ducks scored two first-period goals, and the Kings didn’t get to Gibson early — the Ducks killed two penalties in the first period — and that clearly helped his comfort level.