MELBOURNE, AUSTRALIA - MARCH 30: Shaun Grigg of the Tigers celebrates a goal with Dylan Grimes of the Tigers during the 2017 AFL round 02 match between the Richmond Tigers and the Collingwood Magpies at the Melbourne Cricket Ground on March 30, 2017 in Melbourne, Australia. (Photo by Adam Trafford/AFL Media/Getty Images)

Collingwood captain Scott Pendlebury believes the AFL should look into the sneaky ruck tactic Richmond midfielder Shaun Grigg deployed during the fourth quarter to win himself a crucial free kick.

During the off-season, the AFL banned the “third man up” in ruck contests, with each side now having to nominate a designated ruckman at each contest around the ground.

Grigg nominated himself for a contest in Richmond’s forward 50 midway through the fourth quarter, and was awarded the free kick after his opponent Brayden Maynard was penalised for blocking the midfielder.

Toby Nankervis, who has been Richmond’s number one ruckman so far this season, wasn’t present at the ruck contest, and Grigg took advantage of the situation and an unaware Maynard.

Grigg converted the goal to extend Richmond’s lead to 20 points, although post game Pendlebury told 3AW he was concerned by the tactic.

“I don’t think we want to get the game looking like that,” Pendlebury said.

“All sides will see that tonight and think they can take advantage of that. Every side will think, ‘Gee, we might be able to steal one if we can do this’. It might happen.”

Pies coach Nathan Buckley said the incident will prove as a learning curve for Maynard, who the coach believed should have had his eyes on the ball.

“Brayden is a young player (and) he’s still learning. At the very least he should be watching the ball,” Buckley said.

“You shouldn’t have your back to the ball and maybe that would have been enough.”