CLEVELAND — For somebody who was not even supposed to be here, Kyle Schwarber is suddenly the one player the Cubs can’t do without.

The ebullient, chubby-faced, fast-healing 23-year-old propelled the Cubs to a Game 2 World Series victory last night, his two hits and two RBI reawakening a potent lineup that had gone dormant in a Game 1 shutout.

After last night’s 5-1 victory, this drought-busting Series of epic proportions is tied up as it moves to Chicago for three games.

Cubs starter Jake Arrieta was far sharper than his counterpart, Trevor Bauer, carrying a no-hitter into the sixth inning.

The Cubs never trailed, jumping out to a 1-0 lead in the first before Schwarber began to assert himself. Schwarber blew out his knee in the second game of the season and wasn’t expected back until 2017, but his rapid recovery allowed him to be added to the roster for this Series. He went 1-for-3 with a double and a walk in Game 1.

Last night, he whiffed twice but also drew a walk and had a pair of RBI singles.

His presence alone qualifies as enough of a medical miracle. His contributions take it to another level.

“I’m just trying to put together good at-bats now,” Schwarber said. “I just want to help this team toward its ultimate goal.”

That’s why the Cubs and general manager Theo Epstein went to great lengths to bring him to this stage.

“I think he’s really good. I can see why Theo sent a plane for him, I would, too,” Cleveland manager Terry Francona said. “That’s a lot to ask, but special players can do special things.”

Cubs manager Joe Maddon has never seen anything to compare with Schwarber’s reemergence.

“I mean, I’ve seen guys come back from injuries during the season but they’ve gone through rehab and they didn’t have that severe of an injury to come back and play. I don’t think there’s any real comp for it,” he said.

A big question in the games in Chicago is whether Schwarber can play the outfield. He has yet to be cleared, medically, to play defense but has been able to DH in these first two games.

Schwarber is ready in Maddon’s eyes but his eyes don’t count as much as what Cubs doctors determine.

“I have total faith he can (play the outfield). I’m not even concerned about that,” Maddon said. “My concern is what the doctor does say regarding lateral movement, quick stops, abrupt stops, change of direction. Those are the kind of things I don’t know anything about.”

Added Schwarber: “We’ll see where it goes. Nothing’s set in stone, nobody’s told me anything.”

Kyle Hendricks will start Game 3 for the Cubs tomorrow night vs. Josh Tomlin.

Arrieta did not offer a hint that he had no-hit caliber stuff early, considering he issued a pair of two-out walks in the first inning. But he retired the next nine batters before walking Jose Ramirez with two outs in the fourth.

Then Arrieta went back to work, retiring the next five before Jason Kipnis broke up the no-no with a one-out double to center in the sixth.

Arrieta finally left after 52⁄3 innings when the Cubs had their 5-1 lead.

“I kind of had my foot on the gas a little too much at the start, trying to do more than I needed to, then I really got back to just executing good pitches towards the bottom of the strike zone,” Arrieta said.

The Cubs starter also got to witness Schwarber’s behind-the-scenes work ethic pay off on the big stage.

“He’s in the training room and the weight room for four, five hours a day. He’s in a constant sweat,” Arrieta said. “He’s working extremely hard. To even be able to put himself in this position to be on the World Series roster and to contribute the way he has is remarkable. I’ve never seen anything like it.”