The Panthers fought off interest to re-sign teenage outside back Sunia Turuva and fellow local junior Lindsay Smith this week.

Turuva in particular is believed to have caught the attention of the Dolphins, as well as powerhouse rookie winger Taylan May who re-signed last week.

Wayne Bennett's club have already irked the Panthers by signing young half Isaiya Katoa, while Robert Jennings is also set to head north next year.

The 17th franchise have also been linked to both Stephen Cricthon and Brian To'o for 2024, with the NSW State of Origin pair signed with Penrith until the end of next year.

"One thing is for sure we are going to keep bringing guys through our system, that's our mandate," Cleary said.

"It has been well documented we have our challenges in terms of trying to keep this team together.

"To be able to have those (young) guys stay on when they definitely had options to go elsewhere ... is so good.

"Everyone is looking at our club now, particularly with the Dolphins coming in. They're treating our club like their backyard.

"So it's going to be even harder."

Cleary's comment was said with a tongue-in-cheek expression, but comes after then-Penrith CEO Brian Fletcher claimed it was a "waste of time" developing players and wanted compensation when the Dolphins signed Katoa in February.

Meanwhile Cleary said he was hopeful his six NSW Origin stars would back up to face Newcastle on Sunday, while preparing as if they wouldn't.

The Panthers' 30-18 win over Canterbury last Friday came after the Panthers dropped two games through last year's Origin period, in easily their patchiest part of their premiership season.

"It was a bit of a milestone for our club last week," Cleary said.

"The same period last year was a bit of a failure, I must say. It was really pleasing to see how they prepared and performed last week.

"It definitely gives us a bit more confidence. I think it just shows a bit more growth in our team this year."

Australian Associated Press