<p><strong>Robert Stack talks to Mark O' Sullivan from Newmarket about his GAA career.</strong></p>

Robert Stack talks to Mark O' Sullivan from Newmarket about his GAA career.

Crossing The Line: Ep. 10, Mark O' Sullivan, Newmarket

Robert Stack looks back at the careers of retired GAA players &amp; has an in depth chat with the player about the highs &amp; lows of their time spent between the white lines.

Sports

Robert Stack looks back at the careers of retired GAA players & has an in depth chat with the player about the highs & lows of their time spent between the white lines.

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Crossing The Line: Ep. 10, Mark O' Sullivan, Newmarket

Crossing The Line: Ep. 10, Mark O' Sullivan, Newmarket