Perth Wildcats captain Brad Robbins.

Perth Wildcats captain Brad Robbins. Photo: Getty Images

Perth Wildcats co-captain Brad Robbins has announced his retirement, but the NBL club still won't have enough salary cap points to sign centre Michael Dunigan for the rest of the season.

Robbins, who has made 175 appearances for Perth for a career tally 213 NBL games, said his long-running battle with various injuries had finally taken their toll.

"Deciding to retire was a long process, a process of elimination," the 27-year-old guard said.

"It wasn't a thing where I woke up one morning and decided. It was something thought out and planned and, in the end, I've made the decision, and I'm happy that I have made it.

"I'm very, very sad to leave the club and to leave my teammates, and that's something that I will miss very much.

"But I'll look forward to the new path that I take in my life.

"I will be forever grateful for the time I have had at the club."

The exact date of Robbins' retirement is yet to be decided, but it's unlikely he'll play many more games for the club.

Once Robbins is officially off the roster, it will leave the Cats with eight free points in their salary cap.

That's not enough to sign 208cm American Dunigan, who is a 10-point player.

Dunigan arrived in Perth last week as an injury replacement player for Matt Knight (calf), and scored 19 points against Wollongong, before pulling in 13 rebounds to go with his 16 points against Adelaide.

The Wildcats (8-3) sit equal top on the ladder ahead of Friday's away clash with Wollongong.

Despite averaging just 4.5 points per game over his 213-match career, Robbins' fearless defence and inspirational leadership proved vital in the Cats' charge to the 2010 championship.

"I've coached him since he was 16 years of age, and it's like watching your son grow up and develop into a man, and that's why I'm so proud of where he's at right now in his life," Wildcats' coach Rob Beveridge said.

"His decision to retire is one of the most courageous things I've seen.

"He knew it was time.

"Brad has put his heart and soul into this club. Every time he steps on the court, he gives everything.

"He is one of the reasons why we have become successful, because of the sacrifice and commitment he's made over the years. He's irreplaceable."

AAP