Ross Lyon says Fremantle ruckman Aaron Sandilands can surprise the competition and play on beyond 2015. 

Sandilands is playing on a one-year contract this season but is coming off an excellent 2014 in which he won his fourth All Australian honour.

After an injury-free pre-season, Sandilands played 23 games last year, which was his first season of 20-plus matches since 2010.

He also came second in the best and fairest to Nat Fyfe.

Lyon said the 32-year-old believed he could go on into 2016 - and possibly beyond.

"I think he'll surprise a few with his longevity," Ross said, as part of AFL Media's #AskTheCoach series.

"I'm sure he's thinking he's got a few more years yet."