Exciting forward Brad Dick could become the first player to make his debut for West Coast in a final after being upgraded from the rookie list.
The Eagles had two vacancies on their senior list because of long-term injuries to Mark LeCras and Mark Nicoski.
The deadline for rookie upgrades expired last night.
Dick has been in fantastic form for East Fremantle with 12 goals in the last three weeks.
The 24-year-old has been told that his promotion doesn't guarantee a game, but the Eagles wanted another in-form player to pick from in the finals.
If they hadn't acted yesterday, Dick couldn't have been upgraded later in the finals.
Dick played 27 games in five years at Collingwood, but struggled with shoulder and knee injuries and was de-listed last season.
The Eagles took him as the 68th selection in the rookie draft despite the fact he would be unavailable to play until midway through the season while he recovered from his second knee reconstruction.
But he has big-game experience - seven of his Magpies games were in front of at least 75,000 people and he played in the 2009 preliminary final.
He played only two AFL matches in 2010 and three in 2011, the last against Geelong in round eight.
Earlier this year, Dick said he had set himself to do everything possible to play for the Eagles.
"I'm just going to do whatever I can do to try and play consistent footy for East Fremantle," he said.
"If I get a game, I get a game, but if not I'll keeping trying to build on my football for next year."
East Fremantle will play East Perth on Saturday in the WAFL first semifinal, so Dick will be playing finals at some level this weekend.
Selection for Sunday's elimination final against North Melbourne would be a fairytale for Dick, who has sacrificed a lot to move home.
His parents remained in Victoria and he also has a son based in Melbourne.
The Eagles have changed their forward line significantly in recent weeks with Quinten Lynch and Ashton Hams dropped. Andrew Strijk came in with little impact, while Josh Hill has averaged just nine possessions and kicked only three goals from his last five matches.