CARLTON midfielder Matthew Kennedy has been ruled out for the rest of the season after sustaining ligament damage in his left ankle.

The injury occurred during training this week and will see the 21-year-old go under the knife.

Blues head of football Andrew McKay said the former Giant would be sidelined for approximately 12 weeks.

"Unfortunately scans have confirmed the ligament damage in that left ankle and clearly we’re disappointed for Matthew that he will miss the remainder of the season," McKay said. 

"He will undergo surgery in the coming days before commencing his rehab program the following week. His determination and diligence to the program coupled with our constant support will enable him to be fit and available for the commencement of the upcoming pre-season campaign."