BRISBANE Lions coach Chris Fagan will undergo surgery after rupturing his hamstring tendon.

Fagan suffered the injury at Monday’s 'Freeze MND' charity event, and scans on Tuesday revealed the worst.

Dressed as 'The Reverend' to honour former boss and mentor Neale Daniher, Fagan went down the waterslide into the waiting ice pool without a hitch.

Then his troubles began.

Standing up to exit the pool, Fagan slipped, stumbled and ripped his hamstring.

With Brisbane having the bye this week, Fagan will remain in Melbourne to spend time with his family.

His daughter is expecting the family’s first grandchild.

Meanwhile, the Lions have suffered another injury blow - this time to a player.

Draftee Jack Payne will miss the rest of the season due to a stress fracture on his tibia.

Lions general manager of football David Noble said he was disappointed the youngster, contracted until the end of 2020, will miss the rest of the year.

"Long-term injuries to any player are disappointing but it is more frustrating with Jack after he had such an exciting and encouraging pre-season," Noble said.