Goofs

Going into the fourth round of the 1913 U.S. Open, Ouimet trails Vardon and Ray by one stroke. However, the final leader board shows all 3 shooting 79, with a total of 304 strokes for the tournament. That means all 3 were tied entering the fourth round.

Near the end of the round, Ouimet and Vardon hit several shots very quickly. Ouimet plays every shot right-handed, except one shot he plays left-handed.

During the playoff, Harry Vardon's ball blocks Francis Ouimet's ball's path on the green, a play called a "stymie." That only applied to singles match play. The playoff for the 1913 US Open was medal (stroke) play, and the stymie rule would not have applied. The USGA eliminated that rule in 1952.

The 17th hole of The Country Club is shown as a dogleg right, and Harry hits his ball into an unseen trap on the right side of the corner of the dogleg. In 1913, The Country Club's 17th hole was a dogleg left, and Vardon hit his ball into a trap on the left side of the fairway.

On the 17th hole of the playoff, Harry Vardon takes a puff of a filter-tipped cigarette, which was first introduced in the 1930s.

The opening shot begins with a scene set in Jersey, overlaid with the caption "Isle of Jersey, England". Jersey is one of the Channel Islands, and the main island of the Bailiwick of Jersey. It's a British Crown Dependency with its own administration. The King or Queen of England is the head of state in their capacity as the Duke of Normandy. It's closer to France than to England, and is neither geographically nor administratively part of England.

Francis looks at a yardage book, a series of hand-drawn diagrams of every hole at The Country Club. Yardage books did not come into use until the 1960s, first by Deane Beman, later popularized by Jack Nicklaus.

In the film, William Howard Taft is the U.S. president during the 1913 U.S. Open. Taft's presidency ended in March 1913. The Open was held in September, when Woodrow Wilson was the U.S. President.

On the morning of the 2nd day of the Open, Sarah Wallis gets into an automobile with a driver. The steering wheel is on the right side of the car.

Francis's putt at the end of regulation play speeds up at least twice.

In the playoff round, a quick pan across the 3-player scoreboard shows Ouimet and Vardon tied at Even. Below their score is Ted Ray at +6. When the pan is reversed frame-by-frame, Ray is really only at +3..

When Francis is in the bunker at the start of the film, the sand has clearly been raked with a modern mechanised bunker bike rather than than by hand.

Eddie Lowery uses the phrase "easy peasy, lemon squeezy". That British phrase became common in the late 1970s.

Francis uses a wooden golf tee while preparing for the tournament. Wooden golf tees became commercially available in 1921.

A shot near the end of the movie shows a door hinge secured with Philips-head screws, which were invented in 1935.

Before the second day of play during the US Open, Francis says Eddie played golf in a "Nor'easter". That term was not used until much later in the 20th century.

When people are trying to persuade Vardon to join the British golf club.

When Francis is in his shop.

Harry Vardon is credited with inventing the "Vardon" grip, which involves the fingers of the hands overlapping. During the golf scenes, Vardon and Ouimet were using the "interlocking" golf grip, the opposite of the "Vardon" grip.

When Sarah asks Francis his name, he pronounces his surname (Ouimet) wee-MAY. She pronounces it wee-MET, which she wouldn't know if she hadn't seen it written out.

In the credits at the end of the movie, Sarah Wallis' name is misspelled "Sarah Wallace" in the "Young Sarah Wallace" credit.