Billy Slater was so concussed from Canberra forward Sia Soliola's high shot that he couldn't remember playing in State of Origin III, according to a Melbourne medical report.
Soliola was on Tuesday night suspended for five games for the dangerous contact that knocked Slater out.
Evidence from Melbourne's head medical official, Dr Jason Chan, claimed the Maroons fullback was "unconscious before he hit the ground".
"Billy knew he was in Canberra, but not that he was at GIO Stadium or why he was there," the report said.
"He had no recollection of previous two weeks. Not aware he had played State of Origin, or that he had injured his ankle that week."
During a 100-minute hearing, the NRL's counsel, Anthony Lo Surdo, demanded a message be sent by the way of a lengthy suspension for the foul play.
Lo Surdo also claimed Slater "had no opportunity to protect himself", as he called for a six-game ban that would've ruled Soliola out for the season.
"He was in an extremely vulnerable position," Lo Surdo said.
"He was not expecting to get hit the way he was hit."
But Soliola's defence lawyer Nick Ghabar accused Dr Chan of speculating as to when Slater was knocked out, and claimed the fact Slater slipped had much to do with the high nature of the hit.
"Within fractions of a second he has dropped markedly ... at least 20cm," Ghabar said.
"Contact would've been hip or shoulder height."
He also argued Slater's slip had prevented himself protecting himself as he fell to the ground, while Soliola claimed it "would've been very hard" to pull out of the tackle.
However the three-man panel of Bob Lindner, Shaun Garlick and Mal Cochrane took just five minutes to agree on the five-game ban.
The suspension marks Soliola's first in either the NRL or English Super League since his debut in 2005.
He will be available for the last round of the NRL season when the Raiders take on Melbourne.
