Carlton has been forced into a late change for their blockbuster against fellow finals fancies Hawthorn as mid-season draftee Flynn Riley replaces ruckman Marc Pittonet.
Pittonet has succumbed to a "minor" hamstring strain, opening the door for Riley's AFL debut. He will be the Blues' sixth debutant.
The 206cm ruckman was elevated from Carlton's VFL program in May, taken with Pick 4.
Riley has played eight games for the Blues' VFL team this year, averaging 36.8 hitouts and 15.8 disposals.
Carlton General Manager of Football Chris Davies emphasises the 22-year-old's ability to adapt to the new ruck rules.
"We think that certainly plays into Flynn's strengths. What we love about Flynn is at the heart of everything he does, he's a competitor."
Key defender Harry Dean returns from a hand injury and will replace Lewis Young (concussion).
The Blues go in chasing their 8th consecutive win under interim coach Josh Fraser, with talk surrounding who is tipped to take the top job.
Hawthorn have made three changes, recalling veteran duo Jarman Impey and Karl Amon as well as announcing Oliver Greeves to debut.
Bodie Ryan, Jack Dalton and Flynn Perez all make way for the Hawks trio, while Nick Watson (hamstring) and Josh Battle (appendix) fail to overcome injury concerns to face the Blues.
