The man who fatally 'coward punched' a stranger at a Mandurah pub has been jailed for seven years, but with time already served and parole, he could be out in four.
Jake Raymond Mosley, 28, struck chef Jason Goodwin, 27, at the Silver Sands Tavern about 4pm on September 20, 2016.
Both Mosley and Mr Goodwin, who were not known to each other, had been playing pool at the Mandurah pub.
Without provocation, Mosley punched Mr Goodwin in a sudden attack that left the young man dead.
Mr Goodwin never regained consciousness following the incident, and died at Royal Perth Hospital a week later.
A subsequent post mortem revealed the cause of his death as "traumatic brain injury".
At the time he was hit, Mr Goodwin had his hands in his pockets.
"The deceased must have been blindsided," Justice Joseph McGrath said prior to Mosley's sentencing in the WA Supreme Court on Friday.
Mosley, who has been in custody since police found him hiding in an Applecross motel three days after the attack, pleaded guilty to manslaughter in May.
Justice McGrath referred to Mosley's punch as a "ferocious strike", with Mr Goodwin's death leaving an "enormous hole" in his family.
At the time of the offence Mandurah detectives said the incident was a "gutless" and "unprovoked".