Yeh come on, Occam's razor here. Either they both decided what an opportunistic time to message mates and jump on sportsbet and have a loose punt that would be easily tied to them and destroy their careers, or they both happened to be injured and wanted to contact friends/family or just check their phones cause their day is done."Hi Dad, yes I'm ok, just a sore nose and a bit of light concussion. Bucks said they'll stick Jordan Roughead on the ball for the rest of the game to cover me, so he might rack up a few more touches than he otherwise would at full back. Oh is there a market for how many touches Roughead gets in the 3rd quarter?"
Unlikely, yes. Impossible, no.
I know the extremely unlikely possibilities, but everyone knows that wouldn't have occurred.
An innocent mistake that probably deserves a small financial penalty to make an example, but nothing to hang them about. Probably just a slip up in a time of worry.