There are not many similarities between professional players and the average hack. But, at least for three days during the PGA Championship, all golfers are united under a single pursuit: leg liberation.

Last year the PGA of America, echoing the sentiments of its European counterparts, announced that competitors would be permitted to wear shorts during practice rounds at all member and Major championships under the organisation’s umbrella, including the PGA Championship.

It was a novel approach at the pro ranks; the US PGA Tour requires trousers at all times, and though the USGA does allow shorts in some competitions, it implements the tour’s ban at the US Open. About half the field at Quail Hollow took advantage of the relaxed dress code, and it was an oddly mesmerising sight.

With St Louis suffering a historic heat wave this summer – temperatures on Monday were in the mid-to-high 30s, with the real feel index hovering at 40° Celsius – more players suited up in shorts at Bellerive, deciding the best way to heat up their games was to stay cool.

Not everyone opted for comfort. Omar Uresti, in his quest to prove that he’s a club pro and definitely not a touring player anymore, was rocking slacks.

As did Dustin Johnson, the prohibitive favourite.Figures. Johnson’s never sweated a day in his life.

Come Thursday, the players will have to go back to pants, and the early forecast is calling for a slight respite from the heat. Still, given the Missouri humidity, you better believe the field is enjoying their freedom while it lasts.