Boxing's only world champion with a 100 percent knockout ratio (Artur Beterbiev), the longest-reigning junior bantamweight world champion (Jerwin Ancajas) and the sport's youngest ticket-seller (Gabriel Flores Jr.) took center stage Thursday at the final press conference for Saturday's ESPN-televised card at Stockton Arena (10 p.m. ET/7 p.m. PT) . (photos by Mikey Williams).

IBF light heavyweight world champion Beterbiev (13-0, 13 KOs) will take on the hard-hitting Radivoje "Hot Rod" Kalajdzic (24-1, 17 KOs) in the main event, while Ancajas (30-1-2, 20 KOs) will make the seventh defense of his IBF junior bantamweight world title against No. 1. contender Ryuichi Funai (31-7, 22 KOs) in the co-feature.

Beterbiev Kalajdzic

Flores (12-0, 5 KOs), the 19-year-old Stockton native making his grand homecoming, will fight Eduardo Pereira Reis (23-5, 19 KOs) in a six-round lightweight special attraction. At the press conference, Stockton Mayor Michael Tubbs presented Flores with a key to the city and the NBA G League's Stockton Kings gave the hometown hero a custom jersey and belt.

Beterbiev Kalajdzic

Flores and his adviser, Rick Mirigian, did not want this event to pass without giving back. They awarded a local high school senior, Sherwood Ruffin-Turner, with a scholarship check to assist with his collegiate studies. Ruffin-Turner is a straight-A student who works two jobs and dreams of becoming an immigration attorney.

Artur Beterbiev

Artur Beterbiev