Complex sentence: He played his first game for Port Adelaide Football Club in 1997 against the Brisbane Lions in Round 5,1997, collapsing on field in 1999 he was diagnosed and treated for Wolff-Parkinson-White syndrome.
Split into simpler sentences: He played his first game for Port Adelaide Football Club in 1997 against the Brisbane Lions in Round 5,1997. In a match in 1999, he collapsed on field, and was diagnosed and treated for Wolff-Parkinson-White syndrome.