Deliberate mistake: In the final race of the film, Seabiscuit performs a flying lead change at the gallop while crossing the finish line, in the famous shot taken underneath his neck. Horses normally only switch their leads around turns while racing; it's something done to relieve pressure on the leading foot. From taking the shot over and over again, the horse playing Seabiscuit was probably tired out and a little tender and began to perform lead changes in other places in an attempt to be more comfortable.
Seabiscuit (2003)
1 deliberate mistake
Directed by: Gary Ross
Starring: Jeff Bridges, Elizabeth Banks, Chris Cooper, Tobey Maguire, David McCullough, Paul Vincent O'Connor
Factual error: In the shot where Pimlico racetrack is shown and the dateline shows November 1, 1938, the Maryland flag is upside down. The black and gold squares should be at the inside top and they are not. (01:35:10)
George Woolf: Pretty small, ain't he?
Red Pollard: He's gonna look a lot smaller in a second, Georgie.
Trivia: The jockey at the crude outdoor race track that Pollard watches as a kid is wearing the same clothes he wears later on in the movie.
Answer: I have tried to look this up, and there is no record of Red's parents. Most likely they just died of old age.