It didn’t take long for Cam Schlittler to show he was ready for this moment.

The Yankees ’ rookie right-hander began Thursday night’s do-or-die Wild Card Game 3 by pumping 100-mph fastball after 100-mph fastball, overpowering the Boston Red Sox in a statement 1-2-3 first inning.

And that was just the start.

In a dominant postseason debut, Schlittler hurled eight scoreless innings in a 4-0 win in the Bronx, sending the Yankees to the ALDS and eliminating their archrival in the process.

The Yankees will face the Blue Jays in the ALDS, with that series set to begin Saturday afternoon in Toronto.

Schlittler, who grew up a Red Sox fan in Walpole, Mass., began the season at Double-A Somerset but quickly shot up the Yankees system and made his MLB debut in July.

He entered Thursday with o

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