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The daughter of a MLB pitcher who threw at Jackie Robinson's head in the movie "42" tells TMZ ... producers blatantly disregarded the truth and unfairly portrayed her dad as a racist.
It was one of the most important scenes in the flick ... big, bad Fritz Ostermueller (pitching for the Pittsburgh Pirates at the time) fired a baseball at Jackie's head ... and then shouted at him, "You don't belong here!!!"
Problem is ... Fritz never beaned Jackie in the head in real life -- according to multiple reports at the time of the incident, the ball struck Jackie's arm.
Now, Fritz's daughter, Sherrill, is lashing out to TMZ -- "The producers of ‘42’ certainly owe my father an apology. If they were going to portray my father falsely, they should have used a fictional name."

However, Sherrill says producers have damaged her father's reputation beyond repair -- she tells us he was a "good man" who was never as angry or violent as he was portrayed in the movie.
We asked Sherrill if she believed her father was a racist -- to which she replied, "My dad, to my knowledge, was not a racist. I was not raised in that type of home."
We reached out to the people behind the movie -- so far, no word back.

