Fremantle's decision to send Kepler Bradley and Adam McPhee back on to the field after suffering significant knocks to the head will be assessed by the AFL.
But the league says that is standard procedure for all head injuries throughout the season.
Bradley received a heavy blow in the first quarter but returned to the game before being substituted out in the second term.
He had more knocks and vomited while on the interchange bench.
McPhee struggled to stand after he was accidentally kneed in the head by Lindsay Thomas. But he also returned to the field and played out the game.
AFL rules ban players from returning to the field on the same day they are concussed.
Teams have a concussion test which players must pass but not all players with head injuries are considered concussed.
AFL media manager Patrick Keane said the league had been monitoring clubs all season.
"We've done it with every player who has a significant head knock. It's been standard practice," Keane said.
"What was the process with the player? How was he? That's something our medical commissioners follow up.
"We've followed all of them up for players whether they have gone back on or not gone back on.
"As always with us, if we take any action against anyone, we tell you."
West Coast midfielder Tom Swift battled blurred vision playing for Claremont on Saturday and could not complete the match. He reported issues at half-time as a result of a knock he suffered at training during the week, but he isn't on the club's injury list this week.
The Eagles subbed Adam Selwood out of their round-21 match against Port Adelaide because of concussion. He played against Collingwood on Saturday night, but said clubs were extremely careful.
"It was the first concussion for me in my career," Selwood said.
"After all the whacks I've had to my head that was a bit surprising.
"I was more than happy to be taken out of that game. I knew that I'd taken a pretty heavy knock.
"You've just got to back the doctors in. They've got your full health in mind.
"When your brain gets injured like that, you've just got to take it easy and get ready for the next week if you can."