Castlemaine sex abuse coach handed more jail time

A junior football coach from Castlemaine who preyed on vulnerable boys has been handed extra jail time after he admitted sexually abusing a 24th victim.

Robert James O'Neill was on Friday sentenced to a year in prison, with a minimum six months, after he admitted indecently assaulting a boy three times in the mid 1970s.

The 73-year-old is serving a minimum sentence of 10 years, which he received in 2004 for sexually abusing 23 other children between 1972 and 1993.

Victorian County Court judge Robert Dyer said O'Neill had preyed on his 24th victim in the mid-1970s.

"It's clear that your victim was vulnerable and had led a relatively isolated and difficult life prior to becoming involved with you as his junior football coach," he told the court.

"You have taken the boy to your home and plied him with alcohol.

"This conduct cannot be described in any other manner than predatory behaviour."

The boy did not disclose the abuse until 2015 and police charged O'Neill in 2016.

The former coach initially denied the offences before pleading guilty.

O'Neill was sentenced to 14 years in jail in November 2004, with a minimum of 11 years, for multiple sex offences.

This non-parole period was reduced to 10 years on appeal.

All the complainants were male, aged between eight and 16, and from country Victoria.

O'Neill was on Friday sentenced under the historic maximum penalty for indecent assault of a male, which is five years.