Collingwood recruit Jack Crisp is being investigated by the AFL for a bet made early last season when he was a Brisbane Lions player.

The AFL's integrity unit is investigating what Collingwood described as "betting behaviour by Jack"' when the midfielder was playing for the Lions.

New Magpie Jack Crisp in action last weekend. Credit:Getty Images

Fairfax Media can also reveal that Crisp's bet was made early in the 2014 season, and sources suggest that the amount of the wager or wagers was under $150 and that it involved AFL and other sports – such as in a multi-bet.

Collingwood's head of football Neil Balme said in a statement to Fairfax Media on Friday evening: "We're aware of the AFL looking at some betting behaviour by Jack when he was a Brisbane player.