GEELONG forward Jeremy Cameron has been discharged from hospital after being knocked out in an accidental collision with teammate Gary Rohan in the side's 15-point win over Melbourne.

"Following further assessment at the hospital Cameron has been cleared of any initial concerns and will continue to be assessed and monitored by the club's medical staff," the club said in a statement on Friday.

"Cameron has entered the League's concussion protocols and will miss the club's round 16 match against the Sydney Swans next Friday night."

The pair contested a marking contest at centre half-forward, with Rohan's shoulder collecting Cameron's head which then hit the turf.

Play was halted for seven minutes as Cameron was stretchered off the field at GMHBA Stadium.

The 30-year-old was conscious as he left the field and offered a thumbs-up to fans.

Coach Chris Scott said post-match that everyone was "a bit shaken" by the incident.

"I don't really know (how Cameron is). He has been taken to hospital, and that can sound dramatic, but I haven't got an update yet. That'll come in time," Scott said.

"I certainly haven't had any indication that it's a horrible situation, but any time one of your players needs to be taken to hospital, even if it's for observation, (it) leaves us all a bit shaken."

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Rohan refocused to kick a game-high three goals in wet conditions, with Melbourne having no answer to his pace on fast breaks.

"The (wet) conditions made the game a bit of a slog at times, so it became a game of will as much of a game of method. I thought as the game went on, we adapted better. I thought they had control of that battle for a while," Scott said.

"We felt for big parts of the game, things were just going against us. When you lose one of your best players so early, certainly in those circumstances, it can put everyone on the back foot. 

"[Rohan's] approach and maturity to really attack the game – and if anyone won the game for us, it was him – and I'm really proud of him and others as well.

"He is so willing to play his role, and it's a role that's hard for some people on the outside to understand. I don't just mean on the field as well, the way he is around the club, he's someone I admire.

"I don't generally individualise – Tom Stewart was pretty good – so he had some competition, but to my eye, Rohan was the most dangerous player on the ground. Because he is the person he is, it did rattle him, and I respect him more for that, because he's not a sociopath, he's got some empathy for one of his best friends who he's accidentally knocked out."

Melbourne coach Simon Goodwin was pleased with his side's first three quarters – the Dees held a seven-point lead at three-quarter time – but was particularly fiery when asked about sidelined midfielder Clayton Oliver.

Oliver wasn't considered for selection after recovering from an infection in his foot, and Goodwin was furious about rumours on social media which suggested a secret illicit drug ban.

"There's a lot been spoken about Clayton in the last 48 hours, and a lot of it is incorrect," Goodwin said.

"Clayton had a hamstring strain against Port Adelaide. He then had an infected foot and spent six nights in hospital. As he's come back into training in the last eight days, his hamstring is tight.

"He'll have scans tomorrow. Anyone who thinks they know better than that, come and walk into our environment and find out. He's off for scans tomorrow and he'll continue to progress. He's training to a certain level, but he's not quite there yet. 

"That's not the player you risk, and we're going to make sure he's fully fit and ready to go. Hopefully the scan tomorrow comes back all clear, but for all the other rubbish that's out there, it's just garbage."

Goodwin said the tide began to turn Geelong's way around the contested ball, which Melbourne had controlled up until the fourth quarter.

"There's no doubt Geelong's pressure, their tackle pressure, their critical contest wins in the last quarter were critical to the game. They got some easy transition goals which hadn't been seen all night from either team," he said.

"For three quarters, there was a lot of optimism in how we played. I think we played the style of footy that suited the conditions. It was a contest game, and for big periods through the middle of the game, we had a lot of dominance. 

"But that last quarter, you walk away incredibly disappointed because one team really ramped up their pressure, and we weren't able to sustain it and win the critical contests you need in those types of game."