"I'm planning on being back. I have this fight set for May 5th, I got my eyes zoned in on this fight. But after this fight I'd like to be super active for ONE Championship. You know I like having fights and trying to put on a show."

27-year-old Northcutt will return to the cage early next month against Ahmen Mujtaba ... Sage's first fight since he lost to Cosmo Alexandre in May 2019. In the loss, SN's face was broken in 8 places, requiring nearly 10 hours of surgery.

Many fans doubted Sage, who is 11-3 as a pro, would ever fight again. But, he says he actually was supposed to return long ago, but COVID had other plans.

"As the 4 years went by, it's been longer than what I expected. I was planning on coming back, I actually had a fight set to come back a couple years after, just about 2 years ago I had a fight set to come back," Northcutt told us.

"You know how the world's been with COVID, shutting things down. I caught COVID as I had a fight scheduled, literally, a week before flying overseas, I caught COVID. That was unfortunate timing. But coming back, it's about time."

Come May 5, Sage believes he'll open the eyes of many MMA fans.

"For ONE Championship, I haven't really had the chance to show all the hard work that I've been putting in," Northcutt says, adding, "I've been training very hard. Training with a great team, great coaches, great fighters, so I'm looking forward to displaying stuff that I've been putting a lot of hard work into."

We also asked Sage what advice he'd offer Raul Rosas Jr. ... the 18-year-old who became the youngest fighter to sign with the promotion. Rosas Jr. recently lost his first fight. We asked Northcutt, who fought as a 19-year-old, what advice he'd offer the young man.

As for his upcoming fight ... it's less than 2 weeks away, and he's ready to roll.