Leigh Adams is knocked to the ground on Sunday. Photo: Getty Images.

The future of North Melbourne onballer Leigh Adams is under a cloud, after he sustained two more head knocks in the VFL on Sunday.

Adams has suffered several concussions in the past, and took a prolonged break from football after suffering prolonged side-effects after being concussed during a VFL practice match in March this year.

Adams was playing his third game back in the VFL for Weribee on Sunday, after he suffered a worrying three concussions last season.

Doctor Peter Larkins said that Adams must seriously consider his future after his latest knock.

“It was great to see Leigh return in the VFL, but I think this incident will really make him reconsider his football future,” Larkins said.

“They need to see how he comes up this week but I fear for his future.

“We’re very conscious of head injuries and concussions these days. In terms of his overall health, the club and family discussions he has will certainly be along the lines of ‘do you really want to keep playing?’

“It wouldn’t surprise me if he considers not progressing with football for the rest of the season.”