Frevian Gonzalez’s pressure and activity was too much for Carlos Marrero on Saturday night in Las Vegas.

Puerto Rico’s Gonzalez landed the harder punches, and he was busier and more accurate than Marrero for most of their four-round lightweight fight at MGM Grand Conference Center. Judges Chris Flores (40-36) and Dave Moretti (40-36) scored all four rounds for Gonzalez (4-0, 1 KOs), but Adalaide Byrd had it a draw (38-38).

Marrero, of Bridgeport, Connecticut, fell to 2-4 after losing a majority decision to Gonzalez, whose win was streamed by ESPN+ as part of the Ivan Baranchyk-Jose Zepeda undercard.

Gonzalez’s left hook moved Marrero backward about 1:10 into the fourth round. Gonzalez connected with a right uppercut approximately 40 seconds into the fourth round.

Gonzalez got Marrero’s attention with a left hook 19 seconds into the third round. He continued pressuring Marrero throughout the third round, which Gonzalez won convincingly.

Gonzalez hit Marrero with two lefts that made Marrero bend over early in the second round.

Gonzalez landed a right hand that backed up Marrero 30 seconds into their fight and forced him to hold. Marrero caught Gonzalez with a left hook with about 40 seconds to go in the opening round, but Gonzalez kept coming forward.

In the previous fight Saturday night, Mitchell Sipe’s switch from MMA to boxing couldn’t have gone better.

Sipe dropped Jimmy Barnes with a right hand just nine seconds into their scheduled four-round heavyweight fight. Barnes got up, but he never recovered.

Sipe clipped him with several additional hard, right hands and staggered the 290-pound Barnes. Referee Robert Hoyle quickly realized Barnes shouldn’t continue and stopped their bout just 43 seconds after it began at MGM Grand Conference Center.

Barnes, of Pine City, Minnesota, dropped to 1-1.

Earlier Saturday night, Haven Brady Jr.’s pro debut didn’t unfold exactly as he had hoped, but the featherweight prospect produced the knockout he sought against Gorwar Karyah.

The 18-year-old Brady, of Albany, Georgia, overcame a point deduction and Karyah’s constant holding to stop Karyah in the final round of their four-round, 126-pound bout. Referee Russell Mora Jr. halted their contest at 2:27 of the fourth round, with Karyah backed against the ropes, taking unanswered punches.

Karyah continued holding Brady during the fourth round, which eventually led Mora to take a point from him. Brady later drilled Karyah with a right hand that knocked him into the ropes.

Karyah tried to fend off an aggressive Brady, but Mora stopped the action because Philadelphia’s Karyah (2-2, 2 KOs) wasn’t defending himself.

Karyah connected with an overhand right with just over two minutes remaining in the third round. Brady cracked Karyah with a flush left hook with 1:41 to go in the third.

A left-right combination by Brady made Karyah hold him tightly with about 50 seconds remaining in the second round. Mora called for a break in the action with 26 seconds on the clock in that second round and deducted a point from Brady for deliberately hitting Karyah low with a left hand.

Brady landed a right hand up top that made Karyah back up with 45 seconds to go in the first round. About 15 seconds later, Brady dropped Karyah with a low blow, but Mora determined that foul was the result of Karyah holding Brady’s head down with his left arm.

Karyah took a couple minutes to recover, but he continued.

In the first fight Saturday night, JJ Mariano wasted little time overwhelming Matthew Reed.

Mariano knocked down Reed with a left hook a little less than a minute into their scheduled four-round junior middleweight match. Reed got up and tried his best to continue.

Mariano swarmed him, however, unloaded a barrage of power shots and forced Hoyle to stop their fight just 1:27 into it. Reed was still standing when their bout was halted.

Mariano, of Reno, Nevada, improved to 3-0 and recorded his second knockout. Reed, of Bakersfield, California, slipped to 1-1.

Keith Idec is a senior writer/columnist for BoxingScene.com. He can be reached on Twitter @Idecboxing.