The Gold Coast injury crisis has deepened, with Jarrod Harbrow and Trent McKenzie ruled out for the remainder of the season and Tom Nicholls looking unlikely to play again in 2015.



Charlie Dixon will also miss Saturday's match against Essendon with an ankle injury.



Harbrow (knee, ankle and shoulder) will have a triple dose of surgery over the coming month after battling through recent matches.



Ruckman Nicholls has avoided damage to his PCL, but aggravated the capsule in his knee against Richmond on Sunday.



It's possible he could be available for the final round against the Sydney Swans.



McKenzie has damage to his hamstring tendon, and after missing the Tigers match at the weekend, needs another month to recover.



It adds to a shocking run for the club in 2015, with starting midfield Gary Ablett, Jaeger O'Meara, David Swallow and Dion Prestia playing just 20 matches between them.



In better news, Jack Martin has passed his initial concussion tests after clashing heads with Trent Cotchin, and should play against the Bombers.