Had a look at the EOTT section where they go through all the B&F results and voting process.
For those who don't know the five members of the match committee cast their votes for each of the 22 players after each game. Each player receives from 0-5 votes (so the maximum a player can get is 25) where 5 votes are awarded for an outstanding performance, then 4 for an excellent game, etc... down to nothing if the player is beaten on the day.
Interesting that Cogs got 112 votes for roughly half a season. He wouldn't have been too far away from winning if he hadn't done his knee based on that. Lids, Hyde, Foley, Krak, Tambo and Razor finished in the top 20. Chubba came 14th with 114 votes out of interest.
Roach and Rodan only got 9 and 1 vote respectively. 36 players received votes in total. McGuane, Moore and Humm didn't receive any votes despite playing 1 or 2 AFL games.