The main candidates
Neville Jetta - came from nowhere to become one of the AFL's premier small defenders
Dom Tyson - part of the well publicized trade, nobody could have expected him to be so good this fast. Averaged 24 disposals, 5 clearances and kicked 16 goals and may win the Bluey
Lynden Dunn - tailed off toward seasons end but was in All Australian discussion after the Essendon win
Cam Pedersen - an argument could have been made before the season started that he was one of the 10 worst players in the league, so his turnaround was quite remarkable. He played a big role in all 4 wins
Feel free to add anyone I may have missed