Garrick Ibbotson was also selected in the squad, with Matt de Boer the only out because of a knee injury.
McPharlin trained on Wednesday and will need to prove he has recovered from a quad injury at Friday’s closed training session.
If he makes the final 22, former Melbourne Demon Sylvia will play his first Fremantle game, as would Tasmanian recruit Grey.
Sylvia performed strongly at WAFL level in Peel Thunder’s win over South Fremantle, kicking three goals.
Grey, 18, has impressed with a string of good efforts for the Thunder, including a solid game matched up against South Freo’s former AFL player Ashton Hams last time out.
A proven defender, Ibbotson has not played since injuring his shoulder in Freo’s round three loss to Hawthorn at the MCG.
Make sure you're online at 3pm on Friday to find out the final 22 for both teams and hear from Freo general manager of football operations Chris Bond.
