Third favourite Joel Selwood has moved from $13 into $10 since last weekend, while 2007 winner Jimmy Bartel and 2006 club best and fairest Paul Chapman have also firmed since Ablett went down.
"We've shortened up a couple of Geelong midfielders, purely because they're going to get more time in the centre and with no Gazza there, they're more chances of getting votes," TAB Sportsbet's Gary Davies told afl.com.au.
"Both Bartel and Chapman were $51, but we've changed them to $26 because we think there is the potential there over the next three weeks for them to pick up some votes.
"And third pick last week was Joel Selwood and he's gone from $13 into $10, so he's still a clear third pick."
Davies said Ablett drifted on Monday after the severity of his adductor strain filtered through, but still expected him to hold his favouritism despite his potential three-week layoff.
"Ablett is now at $2.50, he's still the clear favourite but he has eased out from $1.90, which was his price prior to the commencement of round six," he said.
"He was odds on favourite at $1.90 and he's still favourite but has eased.
"He might ease again, depending on if people completely shun him and there's no money whatsoever.
"The only way he wouldn't be favourite when he comes back is if Chris Judd, who's the closest to him, had a couple of stunners in the next two weeks.
"He'll still be the firm favourite before round seven and then we'll just see how the others ahead of him poll after that."
Judd's popularity as a two-time winner increased over the weekend with punters moving the 2004 winner from $6.00 into $4.80, and clear second favourite to claim the prize.
Richmond announced on Monday evening Matthew Richardson, who placed equal with Ablett last year, was a "doubtful starter" for this weekend's clash with the Brisbane Lions owing to a slight glute strain.
The injury, sustained in round five, hampered his performance against the Sydney Swans on the weekend and saw his own odds drift a little further.
"He was in the betting early on in the season but with Richmond not winning any games and him being injured a couple of times, he's out to $34 now," Davies said.
"He was well backed and down to $31, but seeing as though he's out for one week, he's just gone out to $34."
