York Region police say Gordon Stuckless was taken into custody Wednesday morning.
Investigators say he later appeared in a Newmarket, Ont., court, where he was charged with two counts of indecent assault on a male, four of gross indecency and five of sexual assault.
Police say the new charges stem from allegations brought forward by a man who says he was sexually abused by Stuckless between 1983 and 1985.
They say the man was 11 at the time and knew Stuckless, then working as a teacher's assistant, from school.
Stuckless is due back in court May 3, this time in Toronto.
On Friday, Toronto police arrested Stuckless and laid 15 fresh charges against him related to allegations from five men who claimed they were abused in the 60s and 70s.
Those were in addition to six charges laid last month after two men alleged Stuckless sexually assaulted them on several occasions when they were boys.
The 63-year-old Stuckless was convicted in 1997 for sex assaults on 24 boys while he was an usher at Toronto's Maple Leaf Gardens between 1969 and 1988.