PORT Adelaide utility Justin Westhoff has signed a contract extension for a 13th season after inking a one-year deal for 2019.

The 32-year-old shows no signs of slowing down after one of the best seasons of his career, averaging 19.9 disposals and 5.3 marks per game playing mainly on a wing.

Westhoff has played 248 games for the Power since being selected with the 71st pick in the 2006 national draft.

INDICATIVE DRAFT ORDER Which picks does your club have?

He is on track to pass club great Warren Tredrea (255 games) into second on the Power's all-time list of AFL games played, behind only 300-gamer Kane Cornes.

"I'm really happy to be sticking around for another year and hopefully building on something pretty special that I feel we have here," Westhoff said.

"To still be playing with guys I was drafted with like Travis Boak and Robbie Gray, and to still be playing in my home state into a 13th year is really exciting.

"I've built some good relationships with people within the club, the club is in pretty good shape list-wise and I think I'm in pretty good shape personally so I'm thrilled to be able to be around a bit longer."

Westhoff will be one of the favourites, alongside key defender Tom Jonas, three-time John Cahill medallist Robbie Gray and North Melbourne-bound Jared Polec, to win the club's best and fairest on Friday night.