McCormack pleaded guilty last year to sexually abusing five boys.
The archdiocese said this lawsuit is not a new case of abuse. Instead, the lawsuit is a finalization of a legal process on this particular case.
Family of abuse victim sues archdiocese
The lawsuit claims Daniel McCormack molested the boy at school in 2004 and then at a White Sox game the next year.
The family's attorney said he expected the lawsuit to be resolved in a settlement next week.
