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.