A FIVE-GOAL haul in Port Adelaide's last game of the season has delivered evergreen utility Justin Westhoff his first best and fairest.

Westhoff was one vote behind key defender Tom Jonas and tied in second with midfield bull Ollie Wines going into the Power's round 23 encounter with Essendon.

The 32-year-old, who this week signed a one-year extension to play a 13th season, booted five goals to go with 20 disposals and eight marks in the Power's 22-point loss to the Bombers.

The 248-game veteran earned 20 votes to finish on 179 and become a popular winner of the John Cahill Medal at the Adelaide Convention Centre on Friday night.

Power coach Ken Hinkley was full of praise for Westhoff.

"I've been in football a long time, and I've never seen a more worthy winner," Hinkley said.

"I talk to our players all the time about this bloke and he gets sick of it.

"He's our oldest player, he's our greatest team player, he'll achieve greatness because he'll work hard and has courage to overcome obstacles."

Westhoff was stunned to receive the club's highest individual honour.

"I don't really know what to say," Westhoff said.

"After 12 years, to still be around and still be relevant in the game and standing up here, it's a big honour to accept this award.

"To be honest, it's a bit of a shock to be up here."

Wines and Jonas polled three and two votes respectively in the final game to finish tied for second on 162.

It was another top-five finish for three-time club champion Robbie Gray (fourth, 152), just ahead of North Melbourne-bound winger Jared Polec (151).

Forward/midfielder Chad Wingard, linked to the Western Bulldogs and Hawthorn, showed why the Power will put a high price on his head, finishing sixth on 143 votes.

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Darcy Byrne-Jones (139), Dan Houston (131), captain Travis Boak (126) and Tom Clurey (110) rounded out the top-10.

Former Brisbane captain Tom Rockliff was the best of the Power's marquee recruits, finishing 12th, just ahead of wingman and ex-Cat Steven Motlop (13th).

Former Melbourne utility Jack Watts was 21st.

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The Power's five AFL coaches assessed each player from 0-5 after every game.

Jonas was recognised as the best team man, while Houston collected the best player under-21 award and also took home the coaches' award as the most improved.

Westhoff also received the John McCarthy Award for community service.

2018 John Cahill Medal top 10

1. Justin Westhoff 179 votes
2. Tom Jonas and Ollie Wines 162
4. Robbie Gray 152
5. Jared Polec 151
6. Chad Wingard 143
7. Darcy Byrne-Jones 139
8. Dan Houston 131
9. Travis Boak 126
10. Tom Clurey 110