Some sports books in Nevada plan to capitalize on the Kentucky Derby and Mayweather-Pacquiao fight being held on the same day by offering special crossover bets.
Another intersection of commerce between the boxing and horse racing worlds is the partnership between the fight organizers and Derby long shot Itsaknockout.
The boxers' names will be displayed on the pants of jockey Jockey Luis Saez during the race.
The horse will wear a blanket with Mayweather-Pacquiao branding at appropriate times.
Itsaknockout, owned by Starlight Racing, is listed at 30-1.