Floyd Mayweather Debuting NASCAR Team At Daytona, Driver Believes They Can Win!!

Floyd Mayweather conquered boxing ... and now the legendary pugilist is taking his talents to a totally different sport -- auto racing -- by launching his own NASCAR team, TMT Racing.

The 50-0 boxer is debuting The Money Team Racing ... with 23-year-old up-and-coming driver, Kaz Grala behind the wheel of the #50 car.

And, yes, the #50 was no accident ... it represents Floyd's flawless record.

TMZ Sports recently had a chance to talk to Grala, just days before their debut race, about working with TBE.

"It's really cool. Really, really cool," Kaz says.

"[Floyd's] been talking about getting into NASCAR for a couple years here, and everyone wondered 'who's their driver gonna be?' It's pretty surreal to be the guy that they picked to pilot the 50 car for their maiden voyage."

But, TMT wasn't just given a spot in Sunday's Daytona 500 -- the Super Bowl of stock racing -- because of Floyd's fame ... they had to earn it on the track. And, that's exactly what Grala did Friday night at Daytona International Speedway.

"Making this race is an accomplishment in itself. It's one of the premier sporting events in the country each year. So, it's a huge victory just to be in the race and make it there," Grala told us.

But, as cool as it is, Kaz says Mayweather and the team aren't content with simply being in the race -- which goes down Sunday afternoon on FOX.

Now they've made the field, and they wanna win!