18-year-old boxer Floyd Diaz landed the most vicious body-shot knockout of the weekend

• An 18-year-old boxer scored a brutal knockout by body punch during a Top Rank event Saturday.
• Floyd Diaz, nicknamed CashFlow, landed the money shot in the fourth round.

An 18-year-old called Floyd Diaz landed the most vicious body shot of the weekend when he beat Blake Quintana by knockout Saturday during a Top Rank boxing show at The Hangar in Costa Mesa.

Diaz, a Las Vegas-born fighter, started boxing in 2009, aged six. He won multiple amateur boxing tournaments from 2017 to 2019 and turned pro in 2021.

His first three matches were all decision wins, and so his fourth-round finish of Quintana was the first knockout win of his entire pro career so far.

Quintana unraveled after a three-punch combination.

The first shot in the sequence — a left hand — appeared to ricochet off Quintana's gloves.

Diaz's next strike, a left hook, cracked his cheekbones and opened his body up for the brutal uppercut that closed the show.

The shot to the body forced Quintana to take a knee instantly, and he looked visibly pained from the blow.

The referee started counting loudly, but it became clear the fight inside Quintana had been completely depleted, and he was unable to get back to his feet.

It was all over.

Watch the finish right here:

See another angle right here:

The victory advanced Diaz's pro boxing record to four wins (one knockout), unbeaten.

Elsewhere on the card, Mikaela Mayer defeated Jennifer Han by unanimous decision in the main event, outlanding her opponent by three punches to one, and busting Han's nose open early because of a hard right.

Mayer is one of the more popular women's boxers and is targeting big-name opponents like Alycia Baumgardner or the winner of this month's pound-for-pound clash between Amanda Serrano and Katie Taylor.