Casey Streeter and Wade Faria are only six years apart in age. In boxing age, they may as well be separated by 100 years.

Both will be fighting Saturday night at the Portland Expo. For Streeter, 34, it’s the 19th fight in a professional career that began in 2014 after years of amateur competition. For Faria, 28, it’s the fifth bout in a pro career that began in June of last year, following just five years of learning at the amateur level.

Streeter (14-2-2 as a pro) will defend his New England super welterweight belt against Denzel Whitley (14-1-1) in the main event. Faria (4-0) will box against Victor Pradis (3-4-2). Both Streeter and Faria train with Bobby Russo at the Portland Boxing Club.

For Streeter, boxing has been an almost lifelong passion. Faria came to the sport as an adult, almost by random. After watching some boxing videos, he thought, “I can do that.”

“I thought I was a tough guy, until I got in the ring and I learned I wasn’t. I had to learn the hard way,” Faria said.

He stuck with it, and he’s enjoying success. The whole idea of training and managing his time is part of the attraction. While preparing for a fight, Faria will get up at 4 a.m. for a workout before he goes to his job as a sous chef at a retirement community. After that, it’s to the Portland Boxing Club for another workout. He also needs to have time with his family. Faria has four kids ranging from 11 months to 11 years old.

“What is it to be strong? That’s what captured me. Fast, strong, intelligent,” he said. “You have to put all that together. That’s what makes you strong.”

Sometimes, Faria will jog the 10 miles from his home in Gorham to the Portland Boxing Club. It’s a good way to get his cardio work in, he said. Russo urges him to be more patient in the ring, jab and set up combinations rather than let the bout descend into a brawl. Faria knows he needs to work on that.

“I think I’ve made progress, and I just need to make more progress,” he said. “Be patient, see what they’re giving you and what you can work off.”

Although Faria started late, Russo is comfortable keeping him on a professional fast track. Saturday’s fight is set for six rounds rather than four, and the next one will be eight. Russo is looking to connect Faria with a promoter who can get him bigger fights.

Streeter found the sport when he was 9. It was a refuge from a bad home life. Twenty-five years later, it’s a piece of what keeps Streeter’s life in a good place, along with his wife and two children.

“This sport dug me out of a dark place. It saved my life as a child. I owe my life to this sport,” Streeter said during a recent workout. “That’s why I keep going. This is my life, right here.”

Streeter holds the New England middleweight title to go along with the super welterweight crown he’ll defend Saturday night. That’s why now, at 34, he only looks ahead to the next fight.

“When you have titles, there’s no easy fight. You have to defend those titles. He’s got more in the tank and he’s not failing in any way. He’s a very determined, committed guy,” Russo said.

When he was an amateur fighting in Golden Gloves, Streeter would be asked to say something about himself. His answer was always, I’m in better shape than anybody in this building. That stamina is still his calling card. Streeter is able to outlast most opponents, and that’s why he hasn’t started thinking about retiring just yet.

“I’ve got a few good ones left in me, hopefully. I don’t plan on stopping yet. We’ll see what the future holds,” he said.

Admittedly, Streeter feels like a dinosaur. All the boxers he used to train alongside at the Portland Boxing Club, like Lisa Kuronya and Russell Lamour, have retired. He’s still there, in the place that took him in when he was 9 and showed him he could do something. Russo is like a father, he said.

He comes in after work at the Maine Correctional Center, where Streeter is a special trade instructor. Even when he’s done fighting, he’ll still make the Portland Boxing Club his second home.

“I’ll stick around. I can’t give this sport up. When I’m done fighting, I’ll be here training fighters,” Streeter said.

Streeter knows that day is coming, eventually. Faria knows more opportunity is coming, eventually. For both, another fight in front of the home crowd at the Expo is exactly what they need at this point in their career.