Ken Hinkley confirmed Nathan Blee as the replacement for the injured Paul Stewart on Thursday morning.
Match preview
It will be Blee’s first match since the last of 2012.
The 22-year-old has played all year with his aligned SANFL club North Adelaide, frequently as a midfielder, but Ken Hinkley anticipates him spending most of the game in the backlines.
Port's one forced change comes as Paul Stewart sits out at least the next month with a broken wrist sustained in the club's Balfours Showdown victory.
Both Lewis Stevenson and Tom Logan will travel with the team as emergencies.
Port Adelaide Round 20 team v Geelong
FB: Cameron O’Shea, Alipate Carlile, Dom Cassisi
HB: Matthew Broadbent, Jackson Trengove, Jasper Pittard
C: Chad Wingard, Travis Boak, Sam Colquhoun
HF: Robbie Gray, John Butcher, Angus Monfries
FF: Justin Westhoff, Jay Schulz, Hamish Hartlett
Foll: Matthew Lobbe, Brad Ebert, Kane Cornes
Interchange from: Oliver Wines, Nathan Blee, Andrew Moore, Kane Mitchell
Emergencies: Cameron Hitchcock, Lewis Stevenson, Tom Logan
In: Nathan Blee
Out: Paul Stewart (wrist)