How do the leading players perform when teeing it up the week after a Major?

Dustin Johnson looked to be suffering a hangover from Royal St George’s after missing the cut in this week’s 3M Open but is it part of a wider trend?
Best Bet
It hasn't worked out for DJ this week but does he have a history of flopping after a Major? Not exactly. Earlier this year he posted tied 13th at Hilton Head after a missed cut at the Masters while he took tied 25th in the Travelers Championship after a tied 19th in the US Open. Back in 2019 he came tied 28th at Hilton Head after a tied second at Augusta and later followed tied 51st in the Open with tied 20th in the WGC-FedEx St Jude. His last five post-Major finishes show MC-T25-T13-T20-T28 which is fairly average but wind back to 2018 and he landed the Canadian Open a week after missing the cut in the Open.
Thomas had to settle for tied 40th in this year's Charles Schwab after a missed cut in the PGA while his two post-Major outings in 2019 produced tied 12th in the WGC-FedEx St Jude after tied 11th in the Open and tied 36th in the Travelers following a missed cut in the US Open. Wind back to 2018 and he was tied 56th in the Travelers after a tied 25th in the US Open while he followed a tied ninth in the 2017 US Open with a Travelers missed cut. It means his last five post-Major results read: 40-12-36-56-MC.
So, can 'The Scientist' program himself to perform well after a Major? Earlier this season he took tied 19th at the Travelers after a tied 26th at the US Open. The next examples come from 2019 when he had to settle for tied 48th in the WGC-FedEx St Jude after an Open missed cut, tied eighth at the Travelers after tied 35th in the US Open and a missed cut at Hilton Head following tied 29th at Augusta. It looks poor so far but in 2018 he was tied third at Hilton Head after tied 38th at Augusta, tied ninth at the Travelers after a US Open tied 25th and tied 13th in the Porsche European Open following tied 51st at the Open.
Earlier this year Cantlay posted tied 13th in the Travelers after a top 15 in the US Open but he followed a missed cut at the Masters with another early exit at Hilton Head. In 2019 Cantlay was a strong post-Majors performer with finishes of tied third (Heritage), tied 15th (Travelers) and tied 12th (WGC-FedEx St Jude). They followed tied ninth at Augusta, tied 21st at the US Open and tied 41st at the Open. He also did well in 2017 with tied seventh at Hilton Head after a Masters missed cut and tied 15th at the Travelers following a tied 45th in the US Open. Last seven post-Major finishes: 13-MC-12-15-3-15-7.
Oosthuizen is getting another chance to show his post-Major mettle this week and is doing pretty well so far at the 3M Open where he's tied 19th at halfway. Earlier this year he was tied 42nd at the BMW International Open in Germany after flying in from his second place in the US Open. Last year he followed a tied 23rd in the Masters with a missed cut at the RSM Classic while in 2019 he took tied 36th in the Travelers after tied seventh in the US Open and tied 20th in the WGC-FedEx St Jude after tied 20th at the Open. Back in 2012 he followed a Masters play-off loss to Bubba Watson by winning the Maybank Malaysian Open so the evidence is mixed.
English isn't playing this week following his tied 46th at Royal St George's but perhaps he should be having followed a third in June's US Open by winning the Travelers Championship. Prior to that he'd missed the cut at Hilton Head after tied 21st at the Masters and taken tied 23rd in the Wyndham after tied 19th in the PGA.
Summary
And it's surely no coincidence that Koepka's post-Major win came in another big event - the WGC-FedEx St Jude - rather than a bog-standard one.
Remarkably, Stewart Cink's first five wins came the week after a Major. He took that tally to six by winning at Hilton Head earlier this year.