During his time in the Australian Football League , Rocca became one of the most successful goalkickers in the history of the competition .
Rocca is one of the few players who have converted from Australian rules football to professional American football .
During Rocca 's time in the Australian Football League , Rocca became one of the most successful goalkickers in the history of the competition .
Rocca is one of the few players who have converted from Australian rules football to professional American football .