UFC rolled into Nashville, Tennessee last night as Anthony 'Showtime' Pettis would make his welterweight debut for the organisation.
No stranger to the 170-pound weight class having competed in it for World Extreme Cagefighting in the past, Pettis has spent the majority of his UFC career in the Lightweight division.
But he recently made the decision to make a step-up and was given a tricky first fight in the form of Stephen Thompson.
It wasn't long ago that 'Wonderboy' was challenging for the top prize, but a draw and then a loss to then-champion Tyron Woodley moved him back in the rankings.
Thompson looked comfortable against Pettis in the first round and nearly all of round two, but a stunning Superman Punch from Showtime came out of nowhere.
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Wonderboy's head crashed back against the mat and Herb Dean immediately jumped in to stop the fight - a huge first victory at 170 for Pettis.
When a statistician made it clear that Pettis had joined an exclusive club of three fighters to have won at featherweight, lightweight and welterweight, one of the other men in the group - none-other than Conor McGregor - tweeted his congratulations and somewhat of a warning to every other fighter.
Pettis actually fought on the undercard of McGregor's super-fight with Khabib Nurmagomedov, where he lost in a Lightweight battle with Tony Ferguson but only due to his corner pulling him after suffering a broken hand.
Speaking during the post-fight media scrum in Nashville, Pettis put out a little challenge of his own to the Irishman, but he would have to move up a weight class to make the fight happen.
”Conor McGregor just put a tweet out, so that’s a fun fight,” said Pettis, per MMA Mania.
“Another guy that I love his style. I think that’d be a fun fight. So if he wants to do it, let’s do it. I’m not afraid to fight anybody.
”I don’t follow Conor McGregor, I think he’s an amazing fighter, I think he’s done some amazing stuff for the sport, but I’m not gonna wait for him. If it’s not him, it’s the next guy in line.”
McGregor stated over St. Patrick's Day weekend that he is in negotiations to return in July time, even though his six-month suspension expires in just a few weeks time.
All kinds of names have been banded about, from a Nate Diaz trilogy fight to the winner of next months interim Lightweight title bout between Max Holloway and Dustin Poirier.
Consider Pettis' name well-and-truly thrown into the hat now.