ORANGE - Thompson Boxing Promotions returns to the Doubletree Hotel in Ontario, California on Friday, November 12th, and in the eight round main event of "LOCKED 'N LOADED IV," popular junior welterweight contender Josesito Lopez faces one of his stiffest tests to date in Mexican power puncher Sergio "Pollero" Rivera.

Also featured on this action-packed six bout card will be Southern California standouts Efrain Esquivias and Artemio Reyes, and unbeaten up and comers Jhon Ortega and Miguel Diaz.

Tickets for "LOCKED 'N LOADED IV", priced at $75, $45, and $30, are available now and may be purchased by calling 714-935-0900.

Currently riding a five fight winning streak that includes wins over highly-regarded Marvin Cordova Jr., Anthony Mora, and Patrick Lopez, the 26-year old Riverside native and WBC #10-ranked Josesito Lopez (27-3, 15 KOs) is tearing up the junior welterweight division, and is expecting a big year in 2011. But before he steps up for what he hopes will be a world title shot, he must first get past Huatabampo, Mexico's Sergio Rivera (25-5-2, 16 KOs). Winner of two of his last three, including a 12 round victory over former world champion Cesar Soto, the southpaw Rivera has ended seven fights in three rounds or less, and he'd like to make it eight on November 12th.

A former National Golden Gloves champion, Carson super bantamweight Efrain Esquivias (10-0, 6 KOs) has made a smooth transition to the pro ranks, and he is rapidly becoming one of California's most exciting young fighters. In his most recent bout, Esquivias knocked out previously undefeated Ephraim Martinez, yet he will be in tough again when he takes on unbeaten Mexican Vicente Alfaro (4-0, 1 KO) in an eight round bout.

Riverside's Artemio "King" Reyes (7-1, 6 KOs) returns to the Doubletree for his third straight bout, and this popular Riverside product hopes to thrill his fans once again when he battles Montana's Jesus Vallejo (3-2, 3 KOs) in a welterweight six rounder.

Rounding out this hard-hitting slate of fights will be a junior welterweight bout between New Hampshire's Jhon Ortega (2-0, 2 KOs) and Riverside's Anthony Reyes (0-1), a four round junior bantamweight scrap pitting Allentown's Miguel Diaz (2-0, 1 KO) against Mexico City's Abel Gomez (3-4, 1 KO), and opening the show will be a super bantamweight bout between debutants Alfredo Madrigal of Indio and Cain Garcia of Bakersfield.

Ken Thompson, President of Thompson Boxing Promotions, will make an important announcement to the media at the weigh, in which is scheduled to take place at 12:00pm on Thursday, November 11 at the official grand opening of the all-new Thompson Construction Supply located at 1169 Sherborn Street in the city of Corona, California.  Chronic Tacos will be on hand to cater the event.

Bouts subject to change. Doors open at 6:30pm, and the first bell rings at 7:45pm.  The Doubletree Hotel is located at 222 North Vineyard Avenue in Ontario. The hotel phone number is 909-937-0900.