Jamar played just one match from rounds 14 to 21 due to a calf injury, but he returned to play for Casey last round, claiming 38 hit outs.
Coach Mark Neeld said Jamar would be assessed throughout the week to determine if he would play in round 23.
“Mark’s been back for one week - he was out for seven [weeks], so he’s been back for a week and played about 75 per cent game time for Casey,” he said.
“We’ve been really pleased with what Jake Spencer’s done [in Jamar’s absence].
He’s played eight AFL games, the comeback season after an ACL (knee injury) and he’s been really competitive.
“If Mark gets through, he puts his hand up for selection, so we’ll just see what happens.”
Jamar's last match was against Fremantle in round 16.
