World No.1 Rahm, who counts a Masters triumph among his four PGA Tour wins this season, made US$839,300 (A$1.3 million) for finishing second at Vidanta Vallarta on Sunday, bringing his 2022/23 season total to US$14,462,840 (A$22m).

That tops the previous record of $US14,046,910 ($A21m) set last season by 2022 Masters winner Scottie Scheffler.

Rahm, in his second start since the Masters, was six shots off the halfway lead, fired a 10-under-par 61 in the third round to sit two shots back of leader and eventual winner Tony Finau before closing with a 67 to finish three shots behind.

While disappointed to fall short of retaining the title he won last year, Rahm said the week offered a good reminder that past results and a player's standing in the world of golf are no guarantee of future success.

"A great reminder that what you've done means absolutely nothing – you still have to go out there and do it," Rahm said.

"It's also good so you don't think too much of yourself.

"It's a great reminder of what I still need to do to be able to keep winning tournaments.

"If you ask me, that's almost a blessing in life – to know that the work is not really done. It's never done, the search is ever ongoing."