Fremantle youngsters Hayden Ballantyne and Zac Clarke will make their AFL debuts on Saturday, the club confirmed this evening.

The Dockers, who have blooded seven new players already this season, take on Collingwood at the MCG on Saturday and named the exciting duo in a 25-man squad this afternoon.

Ballantyne was named in a forward pocket, with Clarke on the bench next to bad boy Brett Peake, who returns after a club-imposed one-week suspension.

Clarke will team up with no.1 ruckman Aaron Sandilands in a two-pronged aerial attack against Magpies big man Josh Fraser.

Fraser's sidekick, Cameron Wood, has been dropped from the Collingwood side which beat Sydney last week and was named as an emergency alongside former Dockers goal sneak Paul Medhurst, who is on a comeback from injury.

Clarke flew to Melbourne with the bulk of the Dockers squad this morning and admitted he was nervous when he first realised that he would be playing at the MCG this weekend.

He had expected to be suiting up in the black-and-blue of East Perth to take on East Fremantle in the WAFL on Saturday.

"We were sitting in the team meeting and I saw my name on the board," Clarke said.

"I was pretty nervous at first but now I'm just excited about traveling with the boys and playing on the MCG. I just want to get out there be competitive and enjoy the experience."

Fremantle assistant coach Chris Scott said Clarke was set for a big future at the port club.

"We're very confident he's going to be important for us in the long-term. It's a bit of an art rather than a science in judging when the right time is to bring him in," Scott said.

"He had some slight injury issues early in the year and certainly the first two months of the year he was not playing well enough (with East Perth) and not developed enough to play AFL football.

"He's made some significant ground since then and from the team's perspective we think it's important that at some stage we develop two genuine ruckmen.

"He's got over those injury concerns and has played some pretty solid football in the WAFL."

Ballantyne, recruited from WAFL outfit Peel Thunder, has been close to making his debut on several occasions but has been hampered by a variety of injuries since late last year.

"He's the type of player that we need in the side but he hasn't played much football," Scott said of the 2008 Sandover medalist.

"We were looking to bring him in for the Port Adelaide game (in round 11) but he had some slight back soreness, which held him up for a little while, but since then he's been able to train really well."

Ballantyne has managed just one senior game this season and booted five goals in the round 10 WAFL clash against Swan Districts.

"I'm just relieved to get a crack at this level. The challenge of playing at the MCG against Collingwood in front of a big crowd is pretty exciting," Ballantyne said.

The Magpies made four changes in total with Scott Pendlebury joining Martin Clarke, Steele Sidebottom and Wood (all omitted) on the sidelines.

Nathan Brown, Tyson Goldsack, Dayne Beams and Chris Dawes all return to the line up.