A really mature body with an unmeasured approach to his football .
O'Brien finished the year with an average of 20.4 disposals , 4.7 tackles , five marks and one free for a game in 2013 .
A really mature body with an unmeasured approach to O'Brien 's football .
O'Brien finished the year with an average of 20.4 disposals , 4.7 tackles , five marks and one free for a game in 2013 .