RICHMOND'S backline is set to be stretched even further after lockdown defender Dylan Grimes was offered a one-game suspension for striking Collingwood forward Jamie Elliott.

Meanwhile, the Magpies could be without towering forward Mason Cox after he was charged with engaging in rough conduct against Grimes.

He can also accept a one-game ban.

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The Tigers are already without five-time All Australian Alex Rance, who is out for the season after a right knee reconstruction, and face heavyweights Greater Western Sydney next Saturday at Giants Stadium.

Adding to the side's woes, spearhead Jack Riewoldt is expected to be out for four weeks after injuring his right wrist, while Bachar Houli missed Thursday night's game with a hamstring strain.

Grimes clipped Elliott high with his right elbow after the Magpie had kicked the football late in Richmond's 44-point loss.

Match Review Officer Michael Christian assessed the incident as intentional conduct, high contact and low impact.

That came not long after Cox blocked Grimes' run in the goalsquare, sending him sprawling to the turf.

Christian saw that as intentional conduct, high contact and low impact.

Star Pies onballer Adam Treloar can accept a $1000 fine for a first offence of making careless contact with an umpire, which occurred in the second quarter.

Gun Tiger Shane Edwards has been offered a $2000 fine for striking Treloar, also in the second term.