Bryson Dechambeau’s win at Pinehurst No.2 on 16th June 2024 means that at this moment, all four men’s golf major tournaments are held by players from the USA. Rather predictably, US commentators were quick to mention “US Dominance”. Given that three, out of four men’s major golf tournaments are held in the USA, is this surprising! Do American male players have home-field advantage in world major golf tournaments? A compelling question. Here we investigate this very question. Can statistical analysis prove or disprove home field advantage?
Analysis
The following hypothesis is tested:
Are USA players statistically less likely to win The Open Championship (held in the UK) compared to the majors held in the USA?
We analysed historical data from these tournaments. Results are presented below:
| Major Tournament | Total Number of Majors Held | Total Number of Majors Won by USA Players | Total Number of Majors Won by non-USA Players |
|---|---|---|---|
| USA-Based Majors (The Masters, PGA, U.S. Open) | 277 | 209 | 68 |
| The Open Championship (UK) | 151 | 45 | 106 |
We calculated the proportion of wins by USA players in:
- USA-based Major tournaments
- The Open Championship
Results, are striking:
- USA-based majors: 75.4% of wins by USA players.
- The Open Championship: 29.8% of wins by USA players.
Using a statistical test known as the two-proportion Z-test, we can investigate the statistical significance of this. We find that the difference in these proportions is highly significant, indicating an extremely low probability that this difference is due to chance (for the stats people among you, the calculated Z-score was 10.07).
What does this mean?
The data shows that USA players have a significantly higher likelihood of winning majors held in the USA compared to The Open Championship in the UK. Given that three out of four men’s golf majors are held in the USA, this suggests that USA players have an advantage when it comes to stats mounting up in USA players favour. Exact reasons for this advantage will be numerous, including familiarity with the course, local support, more USA players in the tournament etc etc.
Final thoughts
Given the fact that three out of four men’s major tournaments are held in the USA, is this unfair to non USA players? Does major tournament golf need to be more international? It may just be that the disruption of LIV golf opens the door to discussion around making major tournament golf more international, and more fair for international player’s. What are your thoughts?
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