Regina Tarin Dominates J.J. Aldrich in Noche UFC 4

Regina Tarin outworked a seasoned J.J. Aldrich over three measured, increasingly assertive rounds to bank a unanimous decision in the flyweight opener at Noche UFC 4, while Sean King needed barely half a minute to introduce himself to the promotion with a violent slam knockout of Jessie Rosas.

Tarin stays perfect, outclasses Aldrich over three

No touch of gloves, no feeling-out courtesy. Aldrich marched to the center with intent, chopping at the inside of Tarin’s lead leg, but the unbeaten 21-year-old refused to be backed up for long. She answered with her own inside kick, then snapped Aldrich’s head back with a crisp three-punch volley that set the tone for the night: Tarin would meet fire with volume.

The early exchanges were tight. Both women traded jabs and short combinations in the pocket, neither clearly separating in the first couple of minutes. Aldrich tried to break that stalemate the way she often does—by changing levels. She drove Tarin to the fence, dug to the body and forced a grinding clinch that drew boos from an impatient crowd. Tarin stayed calm, matched knees, and when they finally broke, she went back to sharp counters, tagging Aldrich with a left hook and a rolling left hand over the top.

The judges at cageside all saw the opener for Tarin, and the Mexican prospect came out for Round 2 with the swagger of someone who knew she’d banked it. She literally pointed at the canvas, daring Aldrich to stand and trade. Aldrich obliged with a low kick and some clean right hands that briefly stalled Tarin’s momentum, but the younger fighter’s response was ruthless: multi-punch flurries to the body, then a stiff one-two upstairs.

The fight’s rhythm shifted there. Aldrich landed in spots—a right hook here, a jab there, an elbow from the clinch—but Tarin began to “turn up the heat,” as the commentary team might say. She walked Aldrich down behind a left hook–right cross, answered kicks with right hands over the top and stuffed a key takedown attempt late in the frame. Every time Aldrich tried to reset, Tarin was in her face with another combination, making the veteran work for every inch.

By the time the third round started, Aldrich needed something dramatic. She didn’t get it. Tarin seized the center again, firing a three-punch combo to the head before stepping into the clinch. Aldrich did her best work there, sneaking in elbows on the break and chewing at the leg, but Tarin’s confidence only grew. Rear-leg front kicks, sharp combinations, and then the cleanest shot of the fight: a straight right that split Aldrich’s guard and drew blood from Tarin’s own nose during the ensuing exchanges.

They traded knees in the center, Aldrich’s jab finally finding some rhythm, but the clock was the Coloradan’s enemy. Tarin stuffed a late takedown, stood her ground and exchanged until the horn—fighting like someone who knew she had the cards in her pocket.

All three Sherdog scorers had it 30-27 Tarin. The official judges were a shade closer at 29-28 across the board, but the verdict was the same: Regina Tarin remains unbeaten, now 9-0, with the first high-level scalp of her UFC career on her record and the look of a flyweight who belongs.

King announces himself with brutal 36-second slam KO

If Tarin’s win was about composure and accumulation, Sean King’s debut was about raw violence.

There was no handshake between King and Jessie Rosas either, only intent. King went to the body immediately with a thudding kick, then hacked at Rosas’ lead leg twice, testing balance and reactions. Rosas barely had time to adjust before King closed the distance, locked his hands and cinched a tight body lock.

What happened next ended the fight.

King hoisted Rosas high, turned him in the air and slammed him to the canvas with such force that the impact switched the lights off on the spot. Rosas was out before he hit the mat. King, operating on pure instinct, dropped in a couple of follow-up punches before referee Brad Frank could dive in to halt the onslaught.

The official time: 0:36 of Round 1. The method: KO, slam and punches. The message: at 6-0 with a debut like that, Sean King just put the featherweight division on notice.

On a night built to showcase prospects, Tarin showed polish, King showed power, and the rest of the card suddenly had a standard to match.