Ball faces five indecent act charges, two counts of indecent assault and one charge of sodomy against a boy aged 12-16.
He also faces charges of an indecent act and indecently assaulting another boy aged 12-16 and one of indecent assault against a 7-year-old boy.
Detective Sergeant Bill van Woerkom of the Masterton police child protection team said people had come forward with more information since Ball was charged.