SAN JOSE, Calif. – Numerous prospects were in action on the undercard of the Golden Boy Promotions triple header at the HP Pavilion.

The six-round welterweight bout between unbeaten prospects Karim Mayfield and Mario Lozano began in uneventful fashion, drawing boos from the early crowd at The Tank, but it heated up into an entertaining slugfest by it’s end.

Mayfield (9-0, 5 KOs), who got up from a flash knockdown in the second round, scored knockdowns in the fourth and sixth rounds to secure a unanimous decision over the game counter-punching Lozano (6-1, 5 KOs), who some in attendance thought did enough to win.

Mayfield, who won by scores of 56-55 (twice) and 57-54, is an athletic boxer who likes to load up with his right hand. However, he had trouble finding range with his right hand early in the bout, when Lozano, an accurate but reluctant technician, timed him with hooks and crosses.

The bout heated up in the fourth round when Mayfield scored a flash knockdown of Lozano but was immediately docked a point by referee Raul Caiz Jr. for hitting his opponent while he was down. Lozado got up and both fighters tried to make up for their point deductions, landing hard right hands to the bell.

Lozano buzzed Mayfield at the start of the fifth, Mayfield came back to drop the Mexican native in the sixth, and Lozano landed some hard hooks in the final minute of the fight, which was cheered by the fans in attendance.

Heavyweight prospect Ashanti Jordan (8-0, 7 KOs) dropped journeyman Willie Perryman (10-18, 7 KOs) in the first round of their scheduled six rounder before an overhand right set his opponent up for a stiff jab that ended the bout mid-way to through the second.

Featherweight prospect Charles Huerta (9-0, 5 KOs) was troubled by the constant lateral movement, switch hitting and head-and-upper body movement of Andres Ledesma (15-12-1, 10 KOs) en route to a disappointing split-decision victory.

Huerta, who won by scores of 60-54 and 59-55 (with one judge scoring a more realistic 58-56 for Ledesma), had a good opening round, stalking the veteran behind a busy jab and high guard, but the Colombian journeyman slowly worked his way into the fight by constantly circling to his left while employing a stick-and-move strategy.

Ledesma landed pot shots on the fly, many of which Huerta caught with his gloves but the young prospect was not able to cut the ring off and couldn’t land anything more than an occasional single jab or hook.

Lightweight prospect Luis Ramos (10-0, 5 KOs) got in four quality rounds against Anthony Martinez, an experienced journeyman with 52 pro fights, as he out-classed, out-punched and out-gutted the veteran to a unanimous decision.

Ramos, who won by scores of 40-36 (twice) and 40-35, almost had Martinez (21-29-3, 9 KOs) out at the end of the third round after repeatedly wobbling the game Nicaraguan before the bell. Martinez had the heart and toughness to hang in there with Ramos, but he lacked the reflexes to compete with the young boxer-puncher, who showed some defensive holes but also exhibited the ability to fight effectively in close and from a distance.

Featherweight prospect Eloy Perez (13-0-2, 3 KOs) looked sharp and crafty stopping gutsy Gabe Garcia in the fourth round of their entertaining four rounder. Perez picked apart Garcia (5-6-1, 1 KO) with an educated jab and constantly set the aggressive southpaw up for left hooks to the body and head.

Perez, who scored a technical knockdown in the third when Garcia was knocked into the ropes, had his opponent reeling from the second round until the stoppage near the end of the fourth.

Former amateur standout Karl Dargan improved to 3-0 (1) with a second round knockout of Sergio Orantes, who was making his pro debut. The junior welterweight from Philadelphia, who is trained by Nazim Richardson, showed a nice jab and accurate right hands, which produced the stoppage at 2:25 of the round.

In the opening bout of the card, a four-round junior lightweight bout between Mike Perez (2-0-1, 2 KOs) and Andres Reyes (1-1-1) ended in first-round technical draw after an accidental clash of heads opened a nasty cut to Reyes at the end of the round.