It's not unusual at all.
In his last nine events of the 2023 campaign, Jordan Spieth missed four cuts, two of which came at historically comfortable spots: the Charles Schwab Challenge and Scottish Open.
Rory McIlroy missed the cut at The Players Championship a week after finishing tied for second at Quail Hollow, then he was cut at the BMW PGA Championship, and he suffered the same fate at the Memorial a week later one of his favorite courses. McIlroy did finish seventh at the St. Jude Classic the week before the U.S. Open, but he still was cut at Olympic after shooting a 7-over 77 in his first round, and a 150 overall.
Not only was John Rahm one of the favorites coming into the week, he hadnt missed a cut since the Fortinet Championship in September 2021 (he withdrew from the 2023 PLAYERS Championship with an illness after the first round). Its the 14th missed cut in 147 PGA events for Rahm and just his third missed cut in his last 57 starts.
The eight missed cuts in Viktor Hovland 's professional career are distributed as follows: four in the 2019-20 season, one in the 2020-21 season and three in the 2021-22 season.
Dustin Johnson, who won four times in 2020, including his second major at the Masters, has now gone seven starts on the PGA Tour without a top 10, a stretch that includes two missed cuts and three finishes of 48th or worse.
Sorry, but you don't know the game that well. It's easy to research such a basic question on whether top golfers miss cuts.