Goofs

Seabiscuit continually changes from a light honey bay to a dark reddish bay. He also grows and shrinks throughout the film, and his mane switches sides. A horse's mane falls to one side or the other, it doesn't change from side to side.

After a scene that takes place circa 1930, a subtitle reads "six years later." In the next scene, which takes place in Tijuana, the subtitles read "1933."

At 1:37 Red Pollard is telling George Woolf how to ride Seabiscuit and tells him to "show him the stick" [or whip]." "And never on the left, they hit him on the left when he was a baby. Earlier, at 46:14, Sunny Fitzsimmons says "I want you to hit him as many times as you can over a quarter of a mile." In the next shot, the jockey is hitting Seabiscuit on the right side.

In the third race, when Tick-Tock beats Crow Segment and they sell out the infield, Seabiscuit's number is 4, except for one quick segment as they parade to the track. Then, Seabiscuit's number is 5.

Before the final (Santa Anita) race, Red Pollard laces his leg brace in the front of his shin. During the race, the brace is laced on the outside of his calf.

War Admiral is repeatedly referred to as being 18 hands vs. Seabiscuit's 15 hands. The horses were actually the same height, with some sources listing Seabiscuit as the heavier of the two.

Red's father calls his wife Agnes. Red Pollard's mother's name was actually Edith. Red's future wife (whom we do not meet in the film) is named Agnes.

During Seabiscuit's Santa Anita Handicap win, he is running dead last early in the race. The charts for the 1940 Santa Anita Handicap show Seabiscuit running no worse than fourth at any point during the race. In fact, he was in perfect striking position around the first turn and down the backstretch.

When Red Pollard and Seabiscuit are recuperating, Red asks the track guy to mow around a tree to make a sort of track. The track guy brings out a push mower. The grass he is cutting is higher than the blades. A push mower won't cut grass that high, it will just push over it.

When Howard fixes the Stanley Steamer he told the owner he could expect to get up to 40mph with the new modifications. However the top speed of that vehicle is much higher than that. In 1906, one had broken the land speed record with a measured speed of 127mph.

When Tick-Tock "interviews" the woman who says she wants to see a match race, he picks up the microphone off of the desk but it doesn't have a wire coming out of it.

When Pollard is being dragged by the runaway horse, his right foot is caught in the left stirrup. Not possible, unless he were riding backwards.

The "wild" mustangs that Tom Smith is chasing at the beginning of the movie are shod.

When Smith sees Seabiscuit for the first time, he says that the horse walked with a limp (Seabiscuit had mildly crippled knees in real life). The horse is not walking with a limp at all.

During Seabiscuit's last race he's at the back of the pack racing against a dozen horses, but the groomed racetrack only shows three sets of horse tracks.

The United States Flag at the Pimlico racetrack has 50 stars. In the 1930s, there were only 48 states.

When the four principals attend a newsreel cinema in 1938, the on-screen announcer says that Seabiscuit is "the biggest thing on four legs since Hope and Crosby." Bob Hope and Bing Crosby didn't team up until Road to Singapore (1940).

The car radio plays music as soon as it's turned on. In the 1930s, all radios had vacuum tubes, which had to warm up for 10 to 15 seconds.

When they allow Red Pollard to ride Seabiscuit into a field to "teach him to be a horse again", 'Charles Howard's car has a modern "antique auto" license plate.

Towards the end of the movie, after Seabiscuit has won the race at the Pimlico racetrack, a lit electronic scoreboard can be seen in the background. Electronic scoreboards didn't exist in the 1930s.

Late in the film, as Charles Howard worries in the bleachers about letting Red Pollard ride in the race, his wife Marcella plays with the marble game. She keeps talking in the next shot, but her lips (at the top of frame) don't move as the audio finishes.

While Red is exercising a horse for his former boss, the "hand start" John Deere tractor makes a sound like an electric starter.

When Red exercises a friend's horse, and the horse bolts, you can see a blue jacket on the other side of the bush that the horse is falling over.

In a wide shot establishing the Pimlico location before the match race with War Admiral, the Maryland state flag is shown flying upside down. This is a common error in real life due to the unique design of the flag. The black portion of the flag should be on top; not the red portion as reflected in the movie shot.

At Pimlico racetrack, the Maryland flag is upside down. The Calvert family seal (gold and black) should be at the top of the pole.

Red torments himself remembering how George beat him in a race saying, "Okey-doke, Johnny. There's my hole; gotta fly". George Woolf's actual words in the race were "Oops. There's my hole; gotta go".

In the narration telling history of Seabiscuit's birth, the narrator says "the was born of Hard Tack, sired by the mighty Man o' War. Later, as Seabiscuit has grown older, and been passed to and mistreated by many different handlers, he's being led into a stable. The narrator mistakenly says ""Soon he grew as bitter and angry as his Sire, Hard Tack, had been". Man o' War was his Sire.