The biggest star in MMA returns to action Saturday at UFC 257, as Conor McGregor will take on Dustin Poirier in the Main Event. The fight is a rematch of the UFC 178 showdown when McGregor was the king of the sport. In that contest, McGregor defeated Poirier by first-round TKO.

McGregor is by far the biggest draw in MMA history and UFC 257 is expected to draw over one million pay-per-view buys globally. Regular prelims start at 8 p.m. on ESPN and ESPN+  and the main card headlined by McGregor and Poirier kicks off at 10 p.m. exclusively on ESPN Plus pay-per-view from Fight Island. Viewers and bettors must have an ESPN+ subscription and will have to cough up $69.99 for the fight.

Conor McGregor is the heavy favorite tonight at more than 1-3, with sportsbooks like JazzSports offering the-340. These odds come at no surprise as McGregor scored a knockout victory in less than two minutes in his first meeting with Poirier. It has been widely reported that McGregor is in phenomenal shape and is as motivated as he's been in a long time. Bettors could be in for something special with this performance as McGregor has predicted he'll win this fight inside 60 seconds. Those kind of prop odds are available at BetOnline.ag, as well as some of these options below.

McGregor, who was a two-division champion, has only fought once in the last 27 months, taking out Donald "Cowboy" Cerrone in forty seconds. Prior to that, he lost on a fourth-round submission to Khabib Nurmagomedov, who was generally considered to be the top pound-for-pound competitor in the sport before announcing his retirement.

Poirier has challenged McGregor before; that was back in September 2014, when he admitted to allowing McGregor to get under his skin, leading to a first-round TKO loss on strikes. But the Cajun from Louisiana, who currently trains at American Top Team in Florida, gathered himself and climbed back up the ladder, finally winning the UFC interim lightweight title. At that point, however, he also ran into Khabib, who beat him on a submission in the third round in September 2019.

McGregor is 22-4, with 19 knockouts, indicating that he can definitely do some damage with his hands. But he's got only one submission on his record, while Poirier has seven, plus a dozen KO's in his 26-6 career mark.

In addition to the main event, UFC 257 offers up a deep card with a lot of great matchups. Lightweights Dan Hooker and Michael Chandler, with Hooker at the -104 favorite. There are several women's fights, including a tight match between Joanne Calderwood (-120) and Jessica Eye.

Bet on UFC 257 at Jazz Sports and get an extra $25 Free Bet to wager on the POIRIER vs MCGREGOR fight!