* AFIS100Years100Cheers: #50
* CastTheExpert: George "the Iceman" Woolf is played by Gary Stevens, a real-life Kentucky Derby-winning, Hall of Fame jockey. Stevens had retired from race riding at the time of the film, but returned to the sport later and is still riding in 2016.
* ExpectingSomeoneTaller: War Admiral is described as being 18 hands high, while Seabiscuit himself is described as being "barely fifteen hands". In reality, Seabiscuit was 15.2 and War Admiral only an inch taller at 15.3. The most notable physical differences between them in real life (War Admiral was almost a hundred pounds lighter but had legs several inches longer than Seabiscuit's, and was overall a more refined horse) would have been difficult to portray in film.
* RomanceOnTheSet: Tobey Maguire met his jewelry designer wife on the set.
* WhatCouldHaveBeen: The second Santa Anita race, as described in the book, is [[spoiler:simultaneously one of the greatest and most heartbreaking episodes in Seabiscuit's career]], but is missing from the movie.
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