Jamie Wingrove, 46, appeared before Suffolk Magistrates’ Court on July 7, where he gave a guilty plea to the charge of affray.
The incident took place outside the Waggon & Horses pub in Newmarket on March 8 last year.
Wingrove was at the pub with his father, Richard Wingrove, and the pair were both separately ejected at around 3.20pm.
Also present were Levi Williams, from Trefonen, and his friend, a fellow jockey, who became involved in a confrontation between the Wingroves, who they had not previously met.
Williams, 27, punched Richard Wingrove three times. He never regained consciousness and died 10 days later.
Williams, formerly of Holland Park, Newmarket but whose latest address was given as Trefonen, admitted manslaughter and was jailed for three years on June 4.
Later that day, the police confirmed that Jamie Wingrove, of Cherry Hinton Road, Cambridge, had been charged with affray.
In a letter to sentencing Judge Enright before he was jailed last month, Williams’ mother wrote: “I pray that yourself and Mr Wingrove’s family are able to see that what happened that day was born from fear and not from malice.”
Williams was said to have told probation: “It must be awful for the family. I can’t imagine what everyone’s going through.
“If I could go back in time and change it, I would.”
Jamie Wingrove is due to be sentenced on August 12 before the magistrates’ court.
