When Joe Harris signed with the Nets this summer, it wasn’t noteworthy, and in all likelihood, it wasn’t even noticed.

In two seasons in the NBA, the Cavaliers’ former second round pick had averaged 2.5 points and just over nine minutes per game.

Last year, Harris played in just five games before undergoing season-ending surgery on his right foot.

It was rare to see him in action — and even rarer to remember it — but he believed he kept getting better.

Soon enough, he believed he would be able to show he wasn’t another below-average Joe collecting a check for riding the bench.

“I’ve always had a lot of confidence in myself even though I didn’t play necessarily a lot my two years in Cleveland,” Harris said Friday at the Nets’ practice facility. “I learned a lot. I had some really valuable experience. I was sitting behind some guys that have been around for a long time and have had a lot of success.

“Trying to get a spot, trying to earn minutes, there, you were playing against great players. So, I think it’s one of those deals where iron sharpens iron. Playing against the better players helped me to have an opportunity wherever I went next to take what I learned. Playing against a higher level, I felt like I improved a lot even though I didn’t play much.”

During the preseason, Harris, 25, impressed the coaching staff that brought him in and believed he could help the rebuilding franchise, becoming coach Kenny Atkinson’s most pleasant surprise on the roster.

Harris scored double-digit points in four of his five preseason games, finishing with his best performance Thursday against the Knicks, in which he scored 15 points on 6-of-8 shooting from the field, hitting all three 3-point attempts.

Helping potentially carve out a meaningful role with the team’s second-unit, the 6-foot-6 guard shot 55.6 percent from the field in the preseason (20 of 36), hitting 62.5 percent (10 of 18) of his 3-pointers.

“They brought me in because of my ability to shoot the ball and that’s what I’m here to do,” Harris said. “It’s one of those deals where if I’m not shooting or being aggressive and taking shots then I’m probably going to be sat on the bench more quickly. Their big thing with me is being able to spread the floor, whether I’m making shots or missing shots, it allows space for other guys.

“That’s my job going into games, to be aggressive and hunt shots.”

In Atkinson’s system, the sharpshooter will have the opportunity to do what he does best. Most importantly, he will have an opportunity.

“Coach Atkinson coming in from Atlanta where they really like to spread the ball out, it’s a similar system to what the Spurs do as well,” Harris said. “It’s always good for shooters like myself. You get a lot of rhythm looks and they want you to be aggressive as well.

“I think [the system] fits me pretty well.”

At the very least, Harris appears as if he’ll get the chance to prove it.

The Nets waived guard Yogi Ferrell, finalizing their 15-man roster before Wednesday’s season-opener at Boston. Ferrell had signed a one-year deal that guaranteed him $100,000, the most Brooklyn ever had given an undrafted rookie free agent.