Collingwood forward Jesse White stands ready to help out in the ruck on Sunday should first-choice ruckman Brodie Grundy be ruled out.

Grundy was taken to hospital on Friday morning after suffering a head knock at training.

The 21-year-old was taken from the Pies’ training field at the Westpac Centre on a stretcher and transported to hospital in an ambulance as a precaution.

Collingwood take on Greater Western Sydney at the MCG on Sunday with dominant ruckman Shane Mumford looming as a key figure.

Young ruckman Jarrod Witts was added to an extended squad on Thursday to partner with Grundy against the Giants, but with some doubt over Grundy’s availability, White may need to spend more time at stoppages.

“He’s a powerhouse ruckman,” White said of Mumford.

“I played a little bit of ruck on the weekend so I can come into the ruck as well and help Wittsy out.

“(Mumford’s) follow-up (work) is huge and if we can take that away from him it will go a long way to helping us win the game.”

A club spokesperson said Grundy’s availability was dependant on the results of tests to be undertaken on Friday afternoon, but added the player was not in any distress after the incident and was still in the selected squad.

The Pies enter round 11 in fourth spot on the ladder but with some question marks remaining over their form this season with their seven wins coming against teams that currently occupy the bottom seven rungs on the ladder.

The match has special significance for White, who will play his 100th AFL game, with 71 of those coming in a seven-year stint with the Sydney Swans.

“It’s felt like it’s taken me a while,” he said.

“It’s been nine years in the system and I’ve enjoyed every minute of it.

“It’s good to look back but I still feel like a lot of good footy is ahead of me.”