Floyd Diaz got the first stoppage of his early career.

The well-regarded 18-year-old upstart dug a hard right hand to the solar plexus of Blake Quintana in the fourth round of their six-round bantamweight. Quintana, grimacing as he kneeled on the canvas, was eventually counted out by referee Sharon Sands.

A jubilant Diaz (4-0, 1 KO), a native of Las Vegas, scored the stoppage 43 seconds into the fourth round Saturday night at The Hanger in Costa Mesa, California on the undercard of the Mikaela Mayer-Jennifer Han women’s WBO/IBFjunior lightweight title unification bout

Diaz, who counts among his mentors Floyd Mayweather Jr., was composed from the outset, working behind a quick jab and connecting on lead left hooks. The speed difference between Diaz and Quintana was staggeringly obvious.

Quintana (4-2, 1 KO) managed to put up a decent effort in the third round, catching Diaz a few times as Diaz pulled out of the pocket. But Diaz took over in the second half of the round, landing hard combinations that had Quintana flopping around the ring.

Duke Ragan picked up some much needed rounds.

Out of the ring for a year because of the death of his father and injuries, the 24-year-old, well-regarded prospect from Cincinnati looked sharp as he cruised past the durable Diuhl Olguin in a six-round featherweight contest.

It was a shutout: Judges Ray Corona, Patricia Morse Jarman, and Zachary Young all scored it 60-54 for Ragan.

A silver medalist in the featherweight division of the 2020 Olympics, Ragan countered expertly and landed timely shots to the body against Olguin, who, despite his crude abilities, had a pretty decent chin.

Ragan began landing at will toward the end of the fifth round. The nard-nosed Olguin, however, took the punches well.

Olguin had some moments in the final round, tagging Ragan clean with a left hook and right hand. Ragan, who apparently decided to take the round off, was never troubled.

Ragan improves to 5-0, with 1 knockout; Olguin drops to 15-22-5 (10 KOs). 

Virginia “Ginny” Fuchs made her professional debut a successful one.

The 2020 U.S. Olympian from Houston, Texas, dominated outmatched Randee Lynn Morales, landing left hands at will, en route to a fourth-round knockout in a six-round women’s flyweight bout.

Fuchs’ first professional bout was a memorable one, as it was on the undercard of a main event featuring her close friend Mikaela Mayer, the junior lightweight titlist.

The technically proficient Fuchs (1-0, 1 KO), a southpaw, connected on a sharp uppercut early in the fourth round, compelling referee Jerry Cantu to stop the bout and save Morales (4-4, 2 KOs) from further beating. The official time of stoppage was 0:24.

Fuchs, who showcased a strong, consistent jab throughout, collected a knockdown – the lone one in the fight – with 10 seconds remaining in the first round, dropping Morales against the ropes.

Morales, Albuquerque, New Mexico, became something of a punching bag in the second round. The quick-footed Fuch continually peppered her outmatched opponent with pinpoint punches, while staying out of range of any return fire.

Fuchs continued the beating in the third round and, with 10 seconds left, seemed to stagger Morales with a hard left to the head. 

Luis Alberto Lopez continues to make a strong case for a world title shot.

The top-ranked IBF featherweight contender from Mexico breezed past Raul Chirino, dropping his outmatched adversary four times en route to a fourth-round (set for eight) knockout.

Lopez landed a three-punch combination that began with a hard right to the body, left uppercut, followed by a left to the body that forced Chirino to the canvas. Referee Sharon Sands at that point had seen enough.

The official time of stoppage was 1:52.

Lopez, who has seen his career take a big leap after upsetting once highly regarded prospect Gabriel Flores Jr. last November, was never troubled in what might charitably be called a stay-busy fight.

Lopez dropped Chirino with a hard left to the right flank with a minute left in the second round. Chirino recovered well and tried to trade with Lopez in the center of the ring.

With a minute left in the third round, a comfortable Lopez scored yet another knockdown of Chirino, this time a straight right counter. Forty seconds later, Lopez dropped Chirino again with a combination, but Chirino seemed to recover.  

Lopez finally ended matters in the fourth round, landing a body combination punctuated with a hard left that dropped Chirino for the fourth and final time.

Lopez improves to 25 wins (14 knockouts) against two losses; Chirino drops to 19-14 (12).

Lopez hopes to contend for the IBF featherweight title, which is held currently by England's Josh Warrington.