HOLLYWOOD, Calif. — Manny Pacquiao was already 35 fights into his Hall of Fame career when Cain Sandoval was born in 2002.

Sandoval, 22, is training with Freddie Roach alongside Pacquiao as the Filipino star prepares for a comeback fight at 46 against Mario Barrios. It's a surprising yet surreal and satisfying scenario.

The junior welterweight upstart Sandoval (15-0, 13 KOs) is preparing for a fight himself, as he returns Saturday against Jonathan Jose Eniz (36-22-1, 17 KOs) at Chumash Casino in Santa Ynez, California. The clash will serve as a co-main event for the 360 Promotions show on UFC Fight Pass, headlined by Callum Walsh.

Eniz is a late replacement. Sandoval’s original opponent was supposed to be Jesus Madueno Angulo (21-0, 15 KOs), who was forced to pull out because of a family emergency.

But Sandoval sounds confident, regardless of who’s standing in the opposite corner.

“I’m 100% prepared for this camp, and I'm going to come out victorious on June 21,” Sandoval told The Ring following a workout at the Wild Card gym in Los Angeles.

The Sacramento-based Sandoval’s switch to Southern California to train with Roach earlier this year proved to be well-timed considering the Pacquiao parade is back in town.

“It's a dream come true to be surrounded by Manny Pacquiao and his team,” said Sandoval. “I got a little starstruck, but it feels good to be surrounded by greatness. I’m supposed to be here around a legend. I’m destined to be great.

“Watching him do this at his age gives me a lot of motivation. I’m most definitely feeding off that energy. I love seeing Pacquiao at the gym. He has over a hundred fans waiting for him every time. I love seeing that because I know I am going to reach that status one day.”

Sandoval said he sticks around after his training sessions to soak in Pacquiao’s presence as much as he can.

“I haven't asked him to spar, out of respect,” said Sandoval. “Just watching him shadowbox is enough for me.”

The hard-hitting Sandoval is coming off back-to-back knockout wins against Mark Bernaldez and Romero Duno during what’s been a difficult time in his life. He discovered last year that his daughter is battling leukemia.

“She's in good health, but it's still a long road ahead,” said Sandoval. “I have more faith now. Sometimes I used to live for the world and live for myself and be selfish, but things have been getting a lot better with my daughter.”

Sandoval said he’s ready for a top-20 opponent next time out, which likely could take place under TKO Group’s Zuffa Boxing banner, and he’s hopeful to get a crack at becoming the youngest male champion in the sport, a title that belongs to the 24-year-old WBO welterweight champion Brian Norman Jr.

"I'm excited to be a part of the future of TKO,” said Sandoval. “It's a change in boxing. It's going to shock a lot of people. Whatever my promoter Tom Loeffler wants me to do for my career, then we'll do it.”