Retired: AFL players' careers ended by concussions
Koby Stevens announces immediate retirement from AFL
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AFL is a contact sport and that's why many Aussies love it. But the players seem to be the ones getting the short end of the stick with too many players getting concussed on the field.
Koby Stevens isn't the first to retire before his prime due to head injuries. Find out more about these players and what they have gone through.
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