CLINTON Young has been dropped for Collingwood's vital clash with Port Adelaide at the MCG on Sunday.



Ben Kennedy and Paul Seedsman have also missed out, Seedsman with an adductor injury.



Former Adelaide Crow and Sydney Swan Tony Armstrong will make his first appearance for his third club. Alex Fasolo and Sam Dwyer have also been included for the Magpies.



Port Adelaide has made some key inclusions. Angus Monfries, Alipate Carlile, and Andrew Moore return for Domenic Cassisi (retired), Matt White (groin), and Aaron Young (foot).



Demons co-captain Jack Grimes is out of Melbourne's clash with Brisbane Lions after injuring his hamstring at training on Friday.



The 25-year-old has not yet had scans to determine the extent of the damage but it is a blow for the defender, given he had played every game so far this season.



Dean Terlich comes into the side and veteran Daniel Cross has been named as an emergency.



The Lions are unchanged after a dominant win over Gold Coast last week.



The Hawks have made two changes ahead of their clash with the Western Bulldogs in Launceston. David Hale and Matthew Spangher return at the expense of Jonathon Ceglar and Will Langford.



The Bulldogs welcome back Shaun Higgins, Sam Darley, and Tom Campbell. Mitch Wallis misses with a foot problem. Easton Wood and Jack Redpath have been omitted.



Essendon and the Sydney Swans have both been boosted by key inclusions ahead of Friday night's crunch game at the SCG, with Bombers ruckman Tom Bellchambers and Swans half-back Rhyce Shaw returning from injury.





Bellchambers, who has been restricted to just five senior games this season because of an ankle injury, last played at AFL level in round 14. He replaces injured half-back Michael Hibberd (hamstring).





Ariel Steinberg, who was elevated to the senior list on Thursday, is named as an emergency.





Swans veteran Shaw comes in for omitted defender Jeremy Laidler, having missed four games with an ankle injury.





St Kilda will regain club champion Jack Steven for Saturday night's clash against Gold Coast at Metricon Stadium.





The Saints have only made one change following their big win over Fremantle in round 18, with Steven, who missed two games with a thigh injury, replacing Cam Shenton.





The Suns, however, have been hit with injury, losing Charlie Dixon (quad), Zac Smith (ankle) and Luke Russell (hip). Clay Cameron has been omitted.





Returning as the Suns hope to bounce back from a humiliating loss to the Brisbane Lions are Michael Rischitelli, Trent McKenzie, Daniel Gorringe and Timmy Sumner.





Adelaide has named gun midfielder Patrick Dangerfield after his knee scare against Collingwood last week, with onballer Scott Thompson returning from a hamstring injury.





The Eagles have been forced to continue their ruck rotation after Dean Cox was concussed in last week's clash against Richmond, replacing the champion big man with Scott Lycett.





Also returning for the Eagles are Josh Hill, Jamie Cripps and Jamie Bennell, with Brad Sheppard (ankle) injured and Ash Smith and Simon Tunbridge dropped.





Sidelined for four weeks after he punched Cox in the face, Richmond's Ty Vickery has been replaced by tall forward Ben Grifiths for the Tigers' clash against Greater Western Sydney at the MCG on Saturday.

The Tigers have also regained Ricky Petterd after he missed one match with a finger injury, replacing injured defender Steven Morris (hand).

As flagged on Wednesday, GWS will be boosted by defender Heath Shaw as he returns from a sickening head knock suffered more than a month ago.

The former Magpie will be joined by Sam Frost, with gun youngster Jeremy Cameron (ankle) and defender Tim Mohr (knee) sidelined.

The axe was expected to fall at North Melbourne following the Kangaroos' shock loss to Carlton, but coach Brad Scott has elected to make just one change, with Aaron Mullett replacing dropped defender Scott McMahon.

The Kangaroos take on Geelong at Etihad Stadium on Saturday night, with the Cats regaining midfielder Allen Christensen and Mark Blicavs, who replace dropped duo Dawson Simpson and Brad Hartman.