What is the largest margin of victory ever in the British Open? The answer to that, considering the entire tournament history, is 13 strokes. But since the history of this major dates to the mid-19th century, perhaps it is better to talk about its margin-of-victory record in terms of pre-1900 and 1900-to-present. So let's do that. Largest Pre-20th Century Winning Margin in the British Open In the 1800s, the record for margin of victory in the Open Championship is 13 strokes, set by Old Tom Morris in 1862. And that is the all-time record, as well, making it perhaps the oldest record in golf history still standing. The runner-up to Old Tom in 1862 was Willie Park Sr. The 1862 Open was just the third time the Open was played. It took place at Prestwick, which at the time was a 12-hole links. The golfers played three rounds, so 36 holes total. Old Tom shot 52-55-56, a 163 total. Here's an important point, though, and one that makes the margin-of-victory records from the p...