Port Adelaide midfielder and former Brisbane captain Tom Rockliff also announced his retirement. Rockliff, 31, has had a horror run of injuries this year. Early in May, he landed awkwardly during a SANFL match, damaging both knees. He was confined to a wheelchair in early May after surgery. Just a week later, he was hospitalized after complaining of acute calf pain. He was diagnosed with deep vein thrombosis and the doctors found blood clots on his lungs. He has been on blood-thinning medication since, and he was barred from taking part in any contact drills when he returned to training duties several weeks ago.