Reports, including from the Financial Times, have suggested Saudi Arabia's Public Investment Fund (PIF) could be preparing to withdraw support for LIV Golf, a move that would place the tour's long-term viability in doubt.
Speaking at LIV Golf's latest event in Mexico City, which teed off on Thursday at Club de Golf Chapultepec, Rahm played down concerns over the league's future.
"Until the people in charge told me if the rumours were valid or not, it didn't make sense for me to think about it or to waste time thinking about it," he said.
"We weren't here [before the tournament week], we knew we were going to play, so the idea was to prepare for a tournament and that's it.
"As everything suddenly came out, so quickly, I wasn't too worried about that, because normally, before the rumours come out, we know something.
"There's always someone in the league who knows something. It was so fast that I didn't really worry about it."
LIV Golf launched in 2022, offering lucrative signing bonuses - reportedly totalling around $1bn - to attract leading players from the PGA Tour, including Bryson DeChambeau, Brooks Koepka, Phil Mickelson, Dustin Johnson and Rahm.
LIV Golf chief executive Scott O'Neil dismissed suggestions the league is under immediate threat, insisting its commercial outlook remains strong.
"If we keep the trajectory going the way we are and the revenue growth going, this is going to be a really good business for a really long time," he said during Thursday's broadcast.
"From a business standpoint, we did almost a half a billion dollars in sponsorship last year with big brands like Rolex and HSBC, Aramco; these are global brands. I'm thinking we're in a wonderful position.
"From a structural standpoint, this business will continue to evolve as it has over the last 12 months. The good news for us is we know how to put on a show. We know how to grow the game.
"But will there be a change in how we operate? Of course. I would have told you that last year and six months ago. We are looking to blend a version of LIV and the national opens, the great national opens around the world. We think they're the most underappreciated, undermarketed, underdeveloped assets in golf, and the reason is it gets us on the ground to grow the game of golf."
He added that the presence of LIV Golf on the international calendar is of benefit to everyone.
"If I am a PGA Tour player, I want LIV to survive. These prize purses are pretty good. Competition is good for business. If I'm a television network, I'd love LIV Golf to survive. It's good television. If I'm a reporter, it certainly makes the news a little more spicy, or has occasionally. If you're a fan, you want more golf around the world.
"So I think there's a lot more to gain with LIV Golf here than LIV Golf gone."
Saudi Arabia's Public Investment Fund (PIF) will stop funding LIV Golf after the 2026 season, according to multiple reports, with players and staff expected to be told as soon as Thursday.
Bryson DeChambeau has reaffirmed his commitment to LIV Golf amid ongoing speculation about his future, saying he intends to remain with the league if it continues beyond this season.
According to a new report, Bryson DeChambeau reportedly used his time at the Masters earlier this month to explore a potential return to the PGA Tour.
LIV Golf chief executive Scott O'Neil has moved to quash rumours that the breakaway circuit is on the verge of collapse, insisting the 2026 season will go ahead "as planned and uninterrupted".
