MLB player Hector Olivera is giving Floyd Mayweather a run for his money -- really -- 'cause the free agent outfielder is dropping $3.5 MILLION on a one-of-a-kind SUPERCAR.
TMZ Sports spoke with Alex Vega from The Auto Firm, who tells us Olivera was so blown away by the Lykan Hypersport ... that he placed an order for the whip despite the HUGE price tag.
The car's ridiculous. It's the 1st of only 7 that'll be built ... has 780 HP, and goes 0 to 62 in 2.8 seconds!