Kangaroo recruit Josh Walker says he was forced to look for a new club after being told by the Lions that his services were no longer required.
"It's a consideration, a possibility (that your career might be over), but myself and my management were always confident I could get somewhere else," Walker said.
"I played some good footy last year and I was hopeful and confident that would be enough for someone to give me another chance.
"There were a couple of other clubs interested but I just felt North was the best fit. Obviously, with Scotty Thompson retiring, there's a hole down back, which suits me.
"Intercept marking is something (coach Rhyce Shaw is) strong on and he wants me to back myself to win back the ball if I can and get the attack started."