By Keith Idec

NEW YORK – In the fight following Wilder’s win, journeyman Brian Jones produced an upset when he stopped previously unbeaten Julian Sosa in the fifth round of a welterweight fight scheduled for eight rounds.

Los Angeles’ Jones (15-10, 9 KOs) knocked down Sosa with just under a minute to go in the fourth round. He recorded another knockdown when Sosa’s glove touched the canvas about 30 seconds into the fifth round.

Jones continued to pressure Brooklyn’s Sosa (13-1-1, 5 KOs) and landed several unanswered power shots as Sosa was backed against the ropes. With Sosa still standing, referee Earl Brown stepped in to stop the action at 2:28 of the fifth round.

Deontay Wilder watched from ringside Saturday night and shouted instructions at his younger brother.

Most of the WBC heavyweight champion’s suggestions were ignored, but Marsellos Wilder still scored a unanimous-decision victory over Nicoy Clarke in their four-rounder on the Adam Kownacki-Chris Arreola undercard at Barclays Center in Brooklyn. Wilder won their sloppy heavyweight bout by scores of 40-36, 40-36 and 39-37.

The 30-year-old Wilder, of Northport, Alabama, improved to 5-1 (2 KOs, 1 NC). The 38-year-old Clarke, a southpaw from Jersey City, New Jersey, lost a third straight fight and slipped to 2-4.

Wilder was in control until the end of the third round, when Clarke landed a straight left hand that moved Wilder into the ropes. Wilder fired back and landed a chopping right hand to the side of Clarke’s head, but Wilder was tiring by that point of the fight.

Wilder buzzed Clarke with a right hand just before the halfway mark of the fourth round. That shot sent Clarke into the ropes, but Wilder couldn’t finish off his slower, older opponent.

Nevertheless, Wilder won a second fight since journeyman William Deets (8-13, 3 KOs) upset him by fourth-round TKO on January 26 at Barclays Center.

Wilder previously out-pointed Tyler Vogel (3-3, 2 KOs) by unanimous decision in a four-rounder June 29 at NRG Arena in Houston. The result of his first fight after Deets defeated him, a first-round knockout of Mark Sanchez (0-2, 1 NC) on March 16 at AT&T Stadium in Arlington, Texas, was changed to a no-contest in April by the Texas Combative Sports Program because Wilder failed an unspecified test it administered.

In the bout before Wilder won, Helen Joseph defeated Edna Kiss by unanimous decision in a six-round women’s super-bantamweight bout.

The Nigerian-born Joseph (16-3-2, 10 KOs), of New Haven, Connecticut, recorded a knockdown and won all six rounds by the same score on each of the three judges’ cards (60-53). Hungary’s Kiss (15-11, 9 KOs) has lost six of her past seven fights.

Earlier Saturday, Jamaican junior middleweight Kestna Davis out-maneuvered and out-landed Nicaragua’s Jaime Meza to win a largely uneventful, four-round unanimous decision.

Davis, a southpaw who resides in Vauxhall, New Jersey, improved to 4-0. Meza, of Compton, California, slipped to 0-3.

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