Jack's home run streak and the fight with the Hiroshima Carp pitcher who hit him were based on 2 actual events by 2 differnt American ex-Baseball players playing in Japan, Randy Bass and Warren Cromartie respectively. See more...
Continuity: Toward the end of the movie when the Dragons are facing the Giants for the Pennant, Hammer is up to bat and get a hit. When you see him round first base, they show a picture of the dugout, where you will find him holding a large hammer. It's tough to be at bat and on the bench.
Other: Towards the end of the movie when the Dragons are playing the Giants for the pennant, Uchiyama argues with the umpire when he called Jack out for touching home plate. He bumps him not once, but twice. No umpire would stand for this; Uchiyama would've been ejected from the game immediatley.
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