PHILADELPHIA – Joseph Adorno delivered the type of knockout his fans from nearby Allentown wanted to see Friday night.

The undefeated lightweight prospect drilled Damian Sosa with a right hand that landed on Sosa’s temple in the second round. Sosa fell through the ropes, face-first, after taking that shot, which made referee Eric Dali immediately stop their scheduled eight-rounder at 1:20 of the second round.

The 20-year-old Adorno also floored Sosa with a left hook toward the end of the first round. Sosa still came out and pressured Adorno at the start of the second round, aggression that cost Sosa on the Oleksandr Gvozdyk-Artur Beterbiev undercard at Temple University’s Liacouras Center.

Adorno, of Allentown, Pennsylvania, upped his record to 14-0 and recorded his 12th knockout. Argentina’s Sosa suffered the first knockout defeat of his career and dropped to 9-3 (7 KOs).

In the final bout before ESPN’s telecast started, Philadelphia heavyweight prospect Sonny Conto stopped Steven Lyons after one round.

After speaking to Lyons in his corner following the first round, a ringside physician instructed Dali to stop their scheduled four-rounder before the second round began. Conto (5-0, 4 KOs) used his jab throughout the first round and had his way with Louisiana’s Lyons (5-6, 2 KOs), who was reluctant to engage.

Adorno’s younger brother, Jeremy, also remained unbeaten on the undercard Friday night.

The 18-year-old super bantamweight prospect dropped Misael Reyes in the second round and won their four-round, 122-pound bout by unanimous decision on. Adorno – whose older brother, lightweight Joseph Adorno, is scheduled to fight later Friday night – won all four rounds on two scorecards (40-35, 40-35), but only two rounds on the other card (38-37).

Adorno advanced to 3-0. Kansas City’s Reyes is 1-3, but he has not been knocked out as a pro.

Adorno dropped Reyes with a right hook in the second round. Adorno was patient once Reyes reached his feet and the action continued, which enabled Reyes to make it to the third round.

Adorno drilled Reyes with a straight left hand in the fourth round, but Reyes took that flush punch well. Reyes kept coming forward, but he couldn’t affect Adorno with any of his punches.

Johnny Rodriguez was tough, but not much of a match for Josue Vargas on Friday night.

Vargas, a skillful southpaw from the Bronx, was the busier, better boxer throughout their eight-round junior welterweight bout on the Oleksandr Gvozdyk-Artur Beterbiev undercard at Temple University’s Liacouras Center. Vargas (15-1, 9 KOs) won all eight rounds on each of the three scorecards (80-72, 80-72, 80-72).

The 21-year-old Vargas also extended his winning streak to nine.

By the fifth round, Vargas took complete control of the fight and began to pick apart Rodriguez with straight lefts and body shots. In the seventh round, Vargas viciously assaulted Rodriguez with right hands to the body, which slowed down Rodriguez and made him move away from Vargas at times.

The 38-year-old Rodriguez (9-5-1, 6 KOs), of Westminster, Colorado, slipped to 1-4 in his past five fights.

Michael Seals wasted little time in knocking out Elio Trosch on Friday night.

The heavy-handed light heavyweight from Atlanta quickly caught Trosch with a counter left hook that knocked down the Argentinean veteran just before the midway mark of the first round. Trosch reached his feet, but Seals’ disoriented opponent stumbled across the ring and needed the ropes to hold him up.

Referee Eric Dali immediately waved an end to their scheduled eight-rounder on the Oleksandr Gvozdyk-Artur Beterbiev undercard at Temple University’s Liacouras Center.

Seals, 37, improved to 24-2 and recorded his 18th knockout.

Trosch, 30, is 1-4-1 in his past six fights. He has lost by knockout or TKO five times since he turned pro in September 2011.

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