Gary Ablett Junior, playing only his second VFL match, will meet cousins Ryan and Luke, both playing for Port Melbourne.
Kelly could also line-up alongside Tony Lockett, who was reported yesterday to be a good chance to play for The Borough today.
Luke, son of Kevin Ablett, is on the verge of making an AFL debut for Sydney while Ryan has kicked 35 goals for Port from full forward this year to top the goalkicking.
The three cousins have never played before with Ryan and Luke, of Drouin origin, and Gary, who played for Modewarre.
Sydney's Leo Barry will also take his first step towards an AFL comeback after recovering from a shocking injury that has sidelined him for 10 weeks.
It will be the talented defender's first game since suffering a lacerated spleen in round three.
For Barry, his return could not come around quickly enough.
``It's been a pretty long time,'' he said.
``I certainly haven't been rushed back because I would have been right to play last week but there was no (Port) game on so I've given myself an extra week to make sure I'm right.''
The stronger than normal Port side will face the Cats, who have registered one more win than their opposition to date.
Geelong, with eight wins and two losses, sits second on the ladder.
The inclusion of Barry is set to toughen Port's backline as it looks to combat Geelong's David Mensch, Brent Grgic, Paul Chambers and Ablett.
The game at Skilled Stadium will be shown on ABC-TV from 1pm.