Seaby hobbled off the field after the opening ruck contest against the Lions, effectively leaving the Swans with 21 men for the remainder of their 20-point win.
He will undergo surgery on Tuesday, leaving Swans coach Paul Roos to choose between forward Jesse White and rookie Mike Pyke as candidates to join Shane Mumford in the ruck against Geelong this weekend.
“I thought when Jesse went into the ruck [against the Lions], he did really well and Pykie’s been in really good form in the seconds,” he said on Monday.
“If it had have happened last week, we would have automatically gone for Pykie but given Jesse played in the ruck on the weekend, he did really well.
“It got him more involved, he jumped really well at the centre bounces so it’s certainly a genuine option to play him there.
“But if we do go the way of Pykie, he’s certainly a lot further advanced than he was last year. His ruck work’s been terrific and he’s finding a lot of the footy around the ground as well.”
However, it wasn’t all bad news from the Swans medical rooms with Dan Hannebery (dislocated shoulder) rated a 50-50 chance to play against Geelong.
Jude Bolton and Ryan O’Keefe (both concussion) recovered well after the game, while Ted Richards and Jarred Moore (rolled ankles) will also be considered for the trip to Skilled Stadium.
The ladder-leading Swans face a daunting task against the Cats, who have won their past 25 home games and thumped Richmond by 108 points at Skilled Stadium on Sunday.
“I turned it on and saw the score was about 114 to 20, so I turned it over to the Carlton-Collingwood game. I know they can play, so I didn’t need that reaffirmed to me. I didn’t want to wake up with nightmares,” Roos said with a laugh.
“[Steve] Johnson five, [Cameron] Mooney five, [James] Podsiadly five… Gary [Ablett’s] not playing either and neither’s [Matthew] Scarlett. I was actually more comfortable watching the Carlton-Collingwood game, to be honest.”
The Swans ran the Cats to within a goal in their most recent meeting at ANZ Stadium in round 20, 2009 but Roos said he was under no illusion as to the challenge Geelong presented at Skilled Stadium.
“It’s the hardest gig in footy. The media questioned their hunger… but they were never going to get complacent after winning two of the last three flags,” he said.
“Their best is still better than anyone else’s in the competition and we’re going to have to be absolutely spot on to give ourselves any chance to win down there.”
