Croker was named the Canberra Raiders' rookie of the year in 1991 and he went on to play somewhat of a utility position over his long career, filling into many spots throughout his team.

[1] In Croker's last game in Canberra he was given the keys to the city by Chief Minister Jon Stanhope in front of over 21,000 fans.

[2] Croker signed a two-year deal to play for the French team the Catalans Dragons from 2007, which, after two successful campaigns, was extended by a further year in 2008.

Croker's experience was of increasing value to the fledgling French side, and his physical fitness and hunger for the game are admired by many.

He is regarded fondly by many Catalans Dragons fans for an audacious drop-goal scored in a 29–22 win over the Bradford Bulls at Odsal in March 2007.