Former two-weight boxing world champion Paulie Malignaggi would be the favorite if he were fighting Conor McGregor.
Malignaggi, who sparred with the UFC lightweight champion previously, retired from the sport after a knockout loss to Sam Eggington earlier this year. He posted a 36-8 record, including seven knockout victories.
McGregor, of course, faces Floyd Mayweather on Saturday night in his first career boxing bout.
The website ProBoxingOdds.com has Malignaggi listed as a -225 favorite over McGregor (+175) at the moment. Those numbers, though, tend to change as more bets come in.