Conor McGregor's career has been a rocket blasting off into places unknown as he's dominated combat sports for years.

His incredible career may only be matched by his massive personality out of the Octagon, and should he step into the boxing ring with Floyd Mayweather, both will certainly only grow. 

Most analysts believe Conor is at a disadvantage in a straight boxing match against the 40-year-old Mayweather, even with McGregor in his physical prime and Money being retired for some time. That would make a win for Conor in that setting an unbelievable career accomplishment. 

McGregor's longtime training partner Gunnar Nelson shared some interesting insight on what might happen if Conor comes out victorious. MMA fans won't be happy to hear this.

“You never know what he’s going to do next,” Nelson said, via MMA Fighting. “If he beats Mayweather, I’m not sure that he will ever fight again, to be honest. I don’t know, but I could see him just floating off and doing something else crazy."

“I’m basing it on that he wants to go bigger every time. And if he beats Mayweather — like, he’s taken two belts, and then he beats Mayweather in this huge superfight — I’m not sure what he’s going to see as a next challenge or a next thing that he wants to do."

That's a huge claim with major implications, but it also makes some sense. The Mayweather fight, should it actually happen, will go down as one of the most lucrative fights in combat sports history. There's not much more room for McGregor to go up from there. 

Gunnar seems to think that will be the case, and someone who's been up close to witness the rise of The Notorious is worth taking into account.

“I just don’t really see what he wants to come into the UFC again for. I’m not sure. Obviously there’s always something [more]. But he’s also having a baby, and I’m not sure where his mind is going to be.

"He’s going to have a ton of money anyway. Maybe he’ll do another boxing match or something if it goes well. Maybe he’ll get more money there and be more interested in that. I don’t know, we’ll see I guess.”

Anything is possible if Conor becomes the man who adds the only blemish to Mayweather's 49-0 record. UFC retirement talk is a big deal, but he'll have to do something no one else has first.