Dustin Johnson said he was “really happy” with his 20th tour victory this weekend at the WGC-Mexico Championship. His final round of 66 beat Rory McIlroy by 5 strokes, who was in the top 5 for the 4th consecutive start.

That’s about as excited as he ever gets. He was more interested in the implications of this win. It grants lifetime exemption on the PGA Tour, in particular from a rule which protects sponsor’s interests. The “strength of field” requirement requires players to add an event which they haven’t played in for the previous four years if they havent played in 25 events the previous season. “I was definitely thinking of that, it was my biggest concern, because I couldnt find somewhere I was going to add a tournament this year”.

All well and good until he was told that he can’t take advantage of this until 2022, because the second part of the exemption states that it must be 20 victories and 15 active years on Tour. Dustin has only been playing on the PGA Tour for 12 years and he has won every year.