In 1974 Klein made his initial first grade appearance against North Sydney at Penrith Park, losing 28–23 in a close encounter.
Over the next four seasons, he played a total of 30 games in the top side which was affected by injuries and a loss of form.
[1] At the end of the 1977 season, Klein signed an agreement to Captain-coach Bathurst St Patricks in the Group 10 CRL competition with limited success.
In 1983, he was transferred in his employment (State Bank) to Quirindi where he came out of retirement and played with "Grasshoppers" for 3 seasons (1983–85).
This rugby league football biography relating to an Australian born in the 1950s is a stub.