The PGA Tour announced more changes Wednesday to have top golfers play against each other more often in moves aimed at preventing more lost talent to Saudi-backed rival LIV Golf.

Top PGA players are committing to playing at least 20 events next year, including 12 "elevated" events with average purses of $20 million, the tour announced on Wednesday.

The move comes amid reports that world number two Cameron Smith of Australia, who won the British Open in July, is among seven more players leaving for the Saudi-backed LIV Golf Series after this week's Tour Championship.

Phil Mickelson, Dustin Johnson, Bubba Watson, Bryson DeChambeau, Brooks Koepka, Sergio Garcia, Henrik Stenson, Patrick Reed and Louis Oosthuizen are among the players who have joined LIV Golf, which debuted in June.

The PGA issued indefinite bans for players who teed off in LIV events.

The PGA hopes to fight further defections by boosting purses to rival the record $25 million on offer at LIV Golf events such as those set for Boston and Chicago next month.

The plan outlined by US PGA Tour commissioner Jay Monahan produces more events pitting top players against one another and follows a players-only meeting last week led by injured superstar Tiger Woods.

"We've all made a commitment to get together more often to make the product more compelling," four-time major winner Rory McIlroy said.

"Everyone in that room realized this is the best way forward."

Top golfers are set to play in four more unspecified "elevated" events, making 12 in all, plus the Players Championship, the four major tournaments and three other PGA events to fill out schedules of at least 20 events, Monahan said.

"Our top players are firmly behind the tour, helping us deliver an unmatched product to our fans, who will be all-but guaranteed to see the best players competing against each other in 20 events or more," Monahan said.

"Elevated" events will include the 2023 Tournament of Champions, the Tiger Woods-hosted Genesis Invitational, the Arnold Palmer Invitational at Bay Hill, the Jack Nicklaus-hosted Memorial Tournament, the WGC Match Play and the three FedExCup playoff events.

"When I tune into a Tampa Bay Buccaneers game, I expect to see Tom Brady throw a football. When I tune into a Formula 1 race, I expect to see Lewis Hamilton in a car," McIlroy said.