"I was just aiming to play one game, so to have played 143 so far and receive life membership is something I'm certainly very proud of," Armfield said.
"It feels a bit surreal that it's my turn to hang up the boots, but the time is right. I am certain that the club is in the best position it's been during my time here, and I can't wait to see all of our youngsters blossom into the stars I know they'll be."