Shohei Ohtani put up arguably the greatest single-game performance in baseball history to send the Dodgers to the World Series ... and now a one-of-a-kind baseball from the historic game is hitting the auction block!
Ken Goldin -- from Goldin -- swung by the TMZ offices on Monday with one of the coolest (and perhaps most valuable) pieces of sports memorabilia, the baseball Ohtani mashed in the seventh inning, his third home run of the game!
In addition to the homers, Shohei also pitched six scoreless innings, striking out 10!