Bolt and Rocca's NFL Eligibility

If this Pro Football Talk rule reference is accurate concerning the eligibility of Usain Bolt for the NFL – he just can’t be signed as a free agent but has to pass through one draft so that each team has a crack at him – it raises the question of the status of Eagles punter Sav Rocca, the former Australian Rules football star who the Eagles signed as a free agent.

Maybe at some point Rocca - all the way from Australia - had the presence of mind to declare himself for an NFL draft while he was tearing up the Australian football circuit. But it is doubtful.