Sam Switkowski's chicken-wing tackle on Collingwood youngster Jack Ginnivan has cost the Fremantle forward a two-game suspension.
The 25-year-old Docker was referred directly to the tribunal on a serious misconduct charge and pleaded guilty at Tuesday night's hearing.
Tribunal chairman Jeff Gleeson and jury members Wayne Henwood and Paul Williams took 20 minutes to decide on the penalty.
AFL counsel Andrew Woods had argued for a two-game suspension, while Switkowski's advocate Seamus Rafferty wanted a significant fine.
Gleeson said if Switkowski had not pleaded guilty, the penalty would have been higher.