Floyd Mayweather has never lost a boxing match as a professional, building up a record of 49-0 over the course of his career. Mayweather will face his most unorthodox challenge to date when he squares off against Conor McGregor in Las Vegas on August 26.
Mayweather vs. McGregor odds and props: Boxer remains betting favorite over UFC star
Anticipation is building as the Floyd Mayweather vs. Conor McGregor fight rapidly approaches, with the sportsbooks continuing to roll out betting lines and props for the event.


The undefeated boxer is a -600 favorite to win the fight at sportsbooks monitored by OddsShark.com, with McGregor going off at +400 as an underdog. Since opening as a -2250 favorite, Mayweather has seen the action move heavily against him to bring his odds down this low. As the fight gets closer, these lines may adjust some more as big money bets could come in on Mayweather.
The general public heavily favors McGregor in this fight. Despite the fact that McGregor has never boxed professionally, many believe that his toughness as well as his advantages in size, strength, and age will help him overcome any technical shortcomings he may have against Mayweather. The consensus among most in the McGregor supporting camp is that the UFC superstar will need to score a knockout to win this fight.
Betting on McGregor to win by KO, TKO or DQ pays +500, which is a slightly better payout than his outright odds to win the fight. Another option for McGregor backers could be to bet on the exact method of victory with “McGregor by Knockout” specifically going off at +600. Or for bettors that believe McGregor will end this fight in short order, a special prop of “Conor McGregor Inside Four Rounds” is available at +700.
Mayweather hasn’t scored a knockout since Sept. 17, 2011, winning each of his last seven fights by decision. This fact, coupled with McGregor’s toughness, might suggest that backers expect Mayweather to defend his way to a decision win, but many prop bets are actually coming in on a Mayweather knockout.
Mayweather by KO, TKO or DQ is a -140 favorite as the most likely method of victory in the fight, followed by Mayweather by Decision at +200.
Linesmakers seem to be pegging this fight to go about eight rounds. The OVER 7.5 rounds is a slight favorite at -135 over the UNDER 7.5 rounds at -105. But when the line is set at 8.5, the UNDER is a -135 favorite and the OVER 8.5 is the underdog at -105.











