Collingwood hasn't ruled Brodie Grundy out of Sunday's clash with Greater Western Sydney, despite the ruckman going to hospital on Friday morning after a head knock at training.

Grundy was carried off the Pies' training ground after he was collected high while he had his head over the ball during a warm up drill.

He was later taken to hospital and left the club on a stretcher with a neck brace on.

Forward Jesse White, who didn't see the incident, admitted it had been a scary few moments for the players.

"You look over and he's down on the ground," White said.

"I'm unsure what happened ... He's gone to hospital as a precautionary thing, you know these things with head injuries.

"He's still named in the side. At this stage I've been told he's ok, so at this stage he's probably still playing."

The Pies are expected to issue another update on Friday afternoon on Grundy's condition and availability to take on the Giants.

However, they have already confirmed the ruckman wasn't in any distress when he was taken from the club in the ambulance, and he was in a stable condition and expected to be fine.

Magpies' Director of Football Neil Balme said it was an unfortunate accident.

"(Grundy) got a whack in the head picking up the ball," Balme said.

"It was a pure accident in a drill, just unlucky."

Balme initially said Grundy was unlikely to play against Greater Western Sydney on Sunday, leaving Jarrod Witts to ruck solo against the Giants' in-form big man Shane Mumford.

Grundy has been in brilliant form this season and has carried the lion's share of Collingwood's ruck work.

He is yet to miss a game in 2015. 

Witts has managed just four games this year and missed last week's clash against Melbourne.

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