ZAC O'BRIEN waited a long time to make his AFL debut .
After helping the Brisbane Lions to an upset win over Carlton , the workaholic midfielder does n't plan on giving up ZAC O'BRIEN 's spot .
ZAC O'BRIEN waited a long time to make his AFL debut , and after helping the Brisbane Lions to an upset win over Carlton , the workaholic midfielder does n't plan on giving up his spot .