On the way to the Dodgers’ thrilling World Series win, Shohei Ohtani made history in Game 4 of the National League Championship Series — pitching the game AND blasting three home runs — and one of the baseballs from the night is about to hit the auction block!

The Dodgers came into the October 17th contest up 3-0 in the series against the Brewers … and Ohtani, who was the starting pitcher, wasn’t only incredible on the mound — but also at the plate.

After striking out the side in the top of the first, 31-year-old Ohtani stepped to the plate in the bottom half of the inning, launching a 446-foot bomb into the right field bleachers — his first (but definitely not his last) dinger of the day.

A fan named Carlo Mendoza happened to be chillin’ outside the stadium, snackin’ on some nachos … when the ball all but landed in his lap.

In the seventh, it was deja vu all over again for Ohtani … who blasted his third homer of the game, and putting the Dodgers up 5-0.

Shohei was 3-3 with 3 HRs and 3 RBIs, and pitched 6 scoreless innings, striking out a whopping 10 batters.

Once Ohtani was removed as pitcher, the Brewers finally plated a run in the 8th, but it was too little, too late … as the Brew Crew’s season ended in disappointment.

Now, the ball Mendoza caught is on the auction block at SCP Auctions, and it’s expected to sell for BIG money when the auction opens on Wednesday, November 5.