Newcastle's signing of 17-year-old Baxter Best could influence whether his older brother Bradman remains with the Knights.
Baxter joined after impressing in the Brisbane Broncos' pathways system, while Bradman says he will assess his worth on the open market before deciding his future.
The NSW centre has rejected Newcastle's first contract extension offer, attracting interest from several clubs, including Parramatta, although he would prefer to stay.
His family will be a major consideration: Bradman has a young daughter and fiancée Kayla Fenech, daughter of Australian boxing champion Jeff Fenech.
Best is among several high-profile centres who could become free agents on November 1 if they have not re-signed by then. The others are Latrell Mitchell, Herbie Farnworth, Matt Burton, Billy Smith, Jack Wighton, Jack Howarth and Deine Mariner.