Miller (86 votes) claimed the award ahead of Melbourne duo Kyle Cheney (83) and Matthew Warnock (62).
Casey’s Danny Nicholls finished fourth and Demon ruckman Paul Johnson rounded out the top five.
Miller also claimed the ‘Respect, Passion & Mateship award’ as voted by his peers.
He also won the club goalkicking award, highlighted by an outstanding 10-goal performance against Gold Coast this year.
Casey trio James Wall (Team Acts Award), Matt Fieldsend (Coach’s Award) and Evan Panozza (Captain’s Award) were also among the trophy winners.
Cheney also received the Alarah/Leader $3,000 Award.
The Gardner-Clark Medal votes
86 Brad Miller
83 Kyle Cheney
62 Matthew Warnock
60 Danny Nicholls
55 Paul Johnson
53 Michael Stockdale
52 Ben Macreadie
48 James Wall
46 Evan Panozza