The Yankees needed a hero on Wednesday night to keep their season alive.

Austin Wells played the part.

The Yankees’ backstop delivered a go-ahead single in the bottom of the eighth inning to drive in Jazz Chisholm Jr. from first base to give the Bombers a 4-3 win over the Red Sox in Game 2.

On a full count with two outs, Wells dunked a hit down the right field line that proved just far enough to score a sliding Chisholm — who had a running start.

The teams will now play a winner-take-all Game 3 in The Bronx on Thursday night.

Starter Carlos Rodon went the first six innings, giving up three runs, and the bullpen was lockdown — with Fernando Cruz, Devin Williams and David Bednar each tossing a scoreless inning.