Western Bulldogs midfielder Ryan Griffen has thrown a scare into the camp ahead of Saturday night's AFL preliminary final against St Kilda at the MCG.

Griffen left training early at Whitten Oval on Friday clutching at his upper leg.

But coach Rodney Eade insists Griffen will be fit to play, and is also bullish defender Dale Morris will also line up.

Morris trained strongly with the team.

Eade said while Morris was "95 per cent" at this stage to make a quicker-than-expected return from a back injury, he won't make a final decision until match day as to whether he will play.

"It depends how he pulls up but I'd say he's 95 per cent," Eade said.

"He's had a fair bit of physical preparation on Wednesday.

"His fitness is pretty good but it's just getting used to the game pressure and game speed."

Morris' season was feared to be over after he was found to have cracked a vertebra in his back in the Bulldogs' round 21 loss to Sydney.

But instead he was named in the Bulldogs side to play the Saints, and is on track to line up on Saints danger man Nick Riewoldt.

Eade said Morris was likely to be the first option to close down the Saints skipper.

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