What happened the last time MMA met boxing?
ESPN's Steve Bunce reflects on the last time a UFC and Boxing cross-fight occurred when Randy Couture faced James Toney.
Mayweather holds final workout before McGregor megafight.
Sal Paolantonio gets an exclusive behind-the-scenes look at Floyd Mayweather's final workout before his fight against Conor McGregor on August 26.
What is the best merchandise for Mayweather-McGregor fight?
Arash Markazi shows off Floyd Mayweather and Conor McGregor merchandise that is on sale prior to their megafight on August 26.
The room keys this week at MGM Grand have the official fight artwork on them. They do this for all the big fights. I've got keys from dozens of fights I've covered here.
Some of the Mayweather-McGregor merchandise at the main MGM Grand gift shop. Picked up some posters for my collection.
Mayweather-McGregor oddly calm in final news conference.
After all the fireworks of their four-city world tour, the braggadocious brawlers strike a different chord three days before their megafight.
Arash Markazi shows you the top-selling Mayweather-McGregor merchandise at the Las Vegas Fight Shop.
Floyd Mayweather says he loves the Mexican fans and is given a sombrero by a reporter.
Dana White said Floyd Mayweather got into the Octagon he would lose in seconds and get hurt badly and permanently.
The average amount bet on Conor McGregor at Las Vegas sportsbook operator CG Technology is $137. The average amount bet on Floyd Mayweather is $5,900.
The WBC "Money Belt" will be presented to the winner of the Mayweather-McGregor fight.
'Sky's the limit' for McGregor.
Conor McGregor explains how he feels about his rise to stardom in the UFC and, if he beats Mayweather, it would be a shock to everyone but himself.
Conor McGregor's confidence in his ability to beat Floyd Mayweather remains high.
The MGM sportsbook on Wednesday took a $500,000 bet on Mayweather to win at -525. It's believed to be the second-largest bet on the fight in Las Vegas that's been reported. Gavin and Joe Maloof bet $880K on Mayweather last week at South Point.
Mayweather confronts heckler after news conference.
Floyd Mayweather warns a heckler in the crowd about his prediction for Saturday's bout.
Conor McGregor doesn't care that Floyd Mayweather is at his strip club every night before the fight and says "the place stinks."
After the Mayweather-McGregor presser, Floyd Mayweather has some words for a media member who tells him to enjoy posing with the belt now. He even puts the belt aside to confront the man.
Atlas: Mayweather sent a message during staredown.
Teddy Atlas joins SportsCenter to analyze the staredown between Conor McGregor and Floyd Mayweather.
The money belt will go to the winner.
Here's how Conor McGregor's odds stack up to some of Floyd Mayweather's notable recent opponents. (ESPN Stats & Info)
Mayweather calls megafight 'best fighting the best.'
Floyd Mayweather praises Conor McGregor and says that Saturday is a matchup of the best in their respective sports.
Extraña pose de Conor McGregor junto a Floyd Mayweather para cerrar una insípida conferencia de prensa en el MGM Grand.
Floyd and Conor nose to nose!!!
McGregor on Mayweather: 'I don't see him lasting two rounds.'
Conor McGregor says that Floyd Mayweather made a mistake in agreeing to use 8-ounce gloves in Saturday's fight.
Floyd Mayweather es recibido más calurosamente, Estoy tomando esto en serio, puedo dar y recibir y para tener 49-0 he dado más. Conor McGregor no será fácil, añadió. El mejor enfrenta al mejor, concluyó Floyd.
Want to know what fights are on the horizon? Check out the boxing schedule for 2017.
Check out boxing senior writer Dan Rafael's rankings within each division.
All boxing champions and titleholders for the four major organization.
Who is the world's best fighter regardless of weight class? Check out ESPN's latest top 10.
Aleksandra "Ola" Magdziak Lopes juggles more roles than most boxers. When the longtime pro, immigrant, attorney, stepmother and wife stepped into the ring on April 7, she fought to honor the memory of her stepson.
Remembering Muhammad Ali, one the greatest athletes to ever live.