The news comes at a horrible time with the Raiders pushing for a finals berth, after winning their last two games.
Croker’s dislocation of his left knee happened late in the first half of Canberra’s 38-12 win over the Raiders last Saturday night.
Canberra will now have to soldier on without their courageous captain, who will leave a massive hole the Raiders must endeavor to fill if they are to make finals in 2018.
Croker has played all 17 games for the green machine this season, notching up seven tries, kicking 63 goals at at 77.8% conversation rate and averaging 73.8 running metres.
The surgery to fix Croker’s dislocated kneecap is scheduled for early next week, in hopes the Canberra star will be ready to undertake pre-season training for the 2019 season at the end of the year.