Collingwood has been fined $20,000 after Jordan De Goey and Jeremy Howe used their mobile phones during the Pies’ loss to West Coast on Friday night.

AFL football boss Steve Hocking told 3AW the rules were really clear.

“Players know the rules, the clubs certainly know the rules, hence the fine has landed,” he said.

“You can’t use them.

“I think there are enough staff on match day to ensure a phone box is safely secured.

“That is a stretch to say you need more staff to look after a phone box.”

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Image: Getty/Scott Barbour/AFL Photos