Speaking on Fox Footy’s Trading Day podcast, Montagna suggested Casboult could be a “moneyball pickup” for the Bombers with place in a young Carlton side uncertain.
“Is Levi Casboult in Carlton’s best 22?” asked Montagna.
“When you look at their defence, Liam Jones, (Lachie) Plowman finished third in their best and fairest, they’ve got (Jacob) Weitering.
“Up forward, we know about Charlie Curnow, (Mitch) McGovern, (Harry) McKay.
“I reckon he’s (Casboult) a very good player.
“So does another club go after him? There are clubs that might need someone like Levi Casboult.
“Offer him a two or three-year deal, give him that security, he could be another moneyball pick-up from some clubs looking for either a key forward to crash and bash, or a key defender.
“Essendon would be perfect.”
Casboult played every game after Round 2 for the Blues this season and has looked a much improved player in defence and attack.
Casboult is contracted until the end of next season and will become an unrestricted free agent at the end of his current deal.
Herald Sun journalist Jon Ralph believes the 29-year-old is yet to receive an offer from Carlton beyond his one year deal.
“His manager is desperate to get an extension passed that,” said Ralph.
“Carlton will not sway away from that one-year deal.
“There are no suitors for him yet.”