The Bulldogs lost Ayce Cordy to back tightness during the warm-up, and did not have a key position player among their emergencies Jack Macrae, Lukas Markovic and Jason Johannisen.
So instead they included Tom Campbell, who had not played VFL the day before, as Cordy's replacement when final teams were named 90 minutes before the first bounce.
In a statement, AFL football operations manager Mark Evans said $5000 of the fine would be suspended, given the club's co-operation and explanation as to why the change was made.