Every season certain players put their hand up for a new role. And every season coaches are presented with an opportunity to try new things.

AFL Media takes a look at Adelaide's players who could be presented with a new challenge in 2019.

Riley Knight: Played most of his 39-game career as a forward, but the speedy 23-year-old has also spent time through the midfield. Has been given tagging roles at times and is almost like a new recruit, having only played eight senior games last year. 

Verdict: Roll Knight through the midfield.

WHAT THEY SAID: Matt Crouch discusses his goals for 2019

David Mackay: The 202-game veteran has been a reliable contributor to the Crows for a long time, but could find himself squeezed out. With Rory Atkins and Paul Seedsman on the wings, and Brodie Smith and Rory Laird across half-back, it's tough to find a role for 30-year-old Mackay, who averaged 16.6 disposals per game last year. 

Verdict: Solid depth player if injuries strike.

Wayne Milera: The smooth mover enjoyed a breakout season last year when he was tried across half-back, but a switch to the midfield could be on the cards. Is in ripping nick, won the Crows' time trials and the return of Brodie Smith allows Milera to move out of defence.

Verdict: A midfield move beckons.