Even the casual baseball fan knows all about Kirk Gibson and his legendary walk-off home run. The serious baseball fan knows that Dennis Eckersley gave up the home run. The devoted Dodgers fan knows that Mike Davis drew the lead over Gibson.

But even the most die-hard Dodgers fans would have trouble identifying the winning pitcher that night.

Blake Treinen, meet Alejandro Pena.

Freddie Freeman hit a Treinen and all-Dodgers game-winner on Friday, delivering the first walk-off grand slam in the 121-year history of the World Series, sending a city into delirium and immediately combining Gibson and Freeman’s home runs.

Treinen saved the Dodgers in the ninth inning of Game 1 against the mighty New York Yankees. The Dodgers saved him in the 10th inning, when Freeman hit a home run so dramatic it was labeled legendary as soon as it landed.

“That,” Treinen said, “was pretty sick.”

Treinen has emerged as the most reliable arm in a deep bullpen. He gave up one run in August, none in September. In October he had conceded one run.

In the ninth inning of a tied game, the Dodgers asked Treinen to replace Michael Kopech with the potential winning run at second base. The Dodgers intentionally walked Juan Soto so that Treinen would face arguably the American League’s most valuable player, Aaron Judge.

“There is peace,” Treinen said. “There is peace when you go out there and just let it be what it is. You can let the situation become big, or you can just try to live in it and enjoy it.”

Treinen called it a “choose your poison” situation. Neither Soto nor Judge are a welcome sight at the plate, but with Judge the Dodgers had the right-handed Treinen facing a right-handed hitter.

Jack Flaherty, the Dodgers’ starter, struck out Judge three times.

“He’s not someone you necessarily want to attack,” Treinen said, “because he’s a great hitter. But every hitter gives you a window every now and then. At that point we were just trying to get some weak contact, or at least change the eye level, and luckily we got a pop-up.

Kopech said, “Blake has already cleaned up behind me in this postseason, so him coming out there to do what he needed to do was huge.”

When Treinen returned to the dugout, Kiké Hernández asked him a question.

“Do you want me to end this?” Hernández asked.

That wouldn’t be the scripted ending to this evening. The Dodgers retired in order in the ninth, with Hernández flying out to end the inning.

In the 10th, Treinen gave up a run when Jazz Chisholm Jr. singled, stole second base, stole third base and scored on a force out. During the regular competition, eight of the nine runners successfully stole against Treinen.

The Yankees led 3-2.

“Initially,” Treinen said, “it was pretty bummed that I would be the one with an L next to my name.”

Hernández again told Treinen that the Dodgers would pick him up. After the game, Hernández said he expected Shohei Ohtani to hit the walk-off home run.

“Fairytale ending,” Hernández said.

Instead, Freeman hit the walk-off home run — and what about the man who could barely walk and delivered his own fairytale ending?

“It had only just started when I blacked out and tried to get onto the field. I almost fell over the railing,” Kopech said. “Freddie is a bad man.”

Treinen rushed to the plate to join teammates who embraced Freeman in a huge hug reminiscent of 1988.

“I don’t think I’ve ever seen a team stand on the field for 20 minutes after the last game just to watch in awe and let the fans enjoy themselves,” Treinen said. “That was the most incredible moment in baseball that I’ve had the privilege of experiencing.”

Legendary Hero: Freeman.

Winning pitcher, with the first World Series victory of his career: Treinen.

“I’ve never thought of that,” says Treinen. “Add it to the list of gratitude for the great man upstairs.”