Johnson is one of only two top 30 players to join LIV Golf. (Louis Oosthuizen, ranked 21st, is the other.) But the overwhelming majority of the rest in the top 30, who are both the vanguard overtaking the game and generally in their 20s or early 30s, have stood with the PGA Tour.

Johnson is 37, and Oosthuizen is 39 and said on Tuesday that he only planned to play one more year on the PGA Tour. In fact, many of the golfers who have committed to this week’s LIV Golf event have seen a declining world ranking lately: Sergio Garcia, 42, was ranked 10th in the men’s world rankings five years ago is now 57th; Graeme McDowell, 42, was ranked 15th in 2012 and is currently No. 374; Ian Poulter, 46, was ranked 12th a decade ago and is now 92nd; Martin Kaymer, 37, the world’s top-ranked men’s golfer in 2011 is now ranked 215th.

There is no inevitability that the PGA Tour’s young guard will maintain their solidarity, especially after next month’s British Open, the last major of the season, is contested. The PGA Tour schedule winds down in August when it turns toward the season-ending FedEx Cup playoffs, which awards the winner an ample $15 million. But some tour players who do not qualify for those playoffs might be enticed to enter some of the final, lucrative LIV Golf events in September and October.

That might especially be true for golfers with lesser tour status, but they would most likely still face a suspension from the PGA Tour that could continue into next year. And perhaps beyond. Is that worth it?

The situation, and the professional golf landscape, is evolving. Johnson, a prominent figure in golf, and Mickelson, a fading, aging — albeit popular — golf personality, have seemed to turn their backs on the status quo. At least temporarily, to hear some of Johnson’s words.