Former World No.1 Rahm was one of the first players to sign up to TGL, the tech-fused golf league that will air primetime on Monday nights next January.
In recent days we have been learning more and more about what we can expect. We now know the TGL format and some players have been assigned teams.
Justin Thomas has joined Atlanta Brave GC whereas Collin Morikawa will be playing for the Los Angeles-based franchise.
As for Rahm there is also no mention of the 2023 Masters champion on TGL's social media pages.
TGL is partnered with the PGA Tour and is seen as a crucial weapon in fending off the rival LIV Golf League.
Rahm, like every high-profile golfer, has consistently been linked with a switch to LIV. It is thought he rejected a figure in the region of $300m.
The superstar hasn't been critical of those that joined the breakaway tour.
Rahm also stated he thought it was wrong for PGA Tour players to be reimbursed financially after the North American circuit announced the landmark 'framework agreement' with LIV's financiers, the PIF of Saudi Arabia.
Mickelson recently claimed new high-profile signings would be made before LIV launches their third campaign next year.
"I know it's going to happen," he declared.
That being said, Rahm has spoken of his excitement of what TGL could offer.
In August, he said TGL was 'different' than he expected.
He explained: "I've seen a virtual reality little video of it. I haven't seen it in person.
"It's different to what I expected. I didn't realize how big it was going to be, which makes it a lot better. I'm looking forward to being able to start it.
"I don't know really what to expect with playing - I have a simulator in my home and it's a 14-foot screen TV and you're 12 feet from the screen, and from what I hear we're going to be 35 yards from the screen and the screen is going to be 60 feet wide and 40-some feet tall.
"I can't even picture how big it's going to be. It's going to be like that wall right there and taller, and we're going quite a bit away, and we're going to be playing from 50 yards into the pin. It's going to be a very, very unique circumstance, but I'm really looking forward to it."
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