Queensland forward Nate Myles says he has absolutely no memory of the spear tackle which saw him sidelined for six weeks by the NRL judiciary on Thursday.
Myles was reported for a dangerous throw in the 49th minute of Queensland's 16-10 win in the State of Origin series decider at ANZ Stadium.
He made the tackle just after receieving a heavy head knock while tackling Matt Cooper.
The Maroons removed a visably dazed Myles from the field as soon as he was placed on report.
Queensland doctor Roy Saunders was remaining tight-lipped on the use of a 'concussion' defence at the judiciary.
"I have an opinion - which I am not prepared to share," Saunders said.
An NRL directive on the issue says the chairman of the judiciary has "complete discretion" in deciding whether medical evidence supports the idea that a player's actions were "contributed to or mitigated by" concussion.
Furthermore, if the player is found to be concussed, judiciary guidelines stipulate that the chairman should contact the chief executive of the NRL and ask that his contract be deregistered until it is considered safe for him to play again.
Faced with no medical evidence of Myles' condition and tough requirements under the disciplinary code, the Roosters had little choice but to enter a guilty plea.