The Archdiocese of New Orleans was facing a crisis. A sex-abuse scandal was bursting into public view, sending shock waves through the heavily Catholic city.

Leaders of one of New Orleans’ other major institutions, the N.F.L.’s New Orleans Saints, were concerned. Gayle Benson, the team’s owner, is a devout Catholic, major church benefactor and close friend of Archbishop Gregory Aymond.

So in July 2018, when Greg Bensel, the Saints’ head of communications, saw a local news story revealing that a former deacon who had been removed from the ministry after abuse accusations was serving in a public role at a local church, he sent an email to Ms. Benson.

“The issues that the Archbishop has to deal with that never involve him,” Mr. Bensel wrote.

In reply, Ms. Benson said that the archbishop was “very upset.” Then, Mr. Bensel made a suggestion: He offered to lend his “crisis communications” expertise, gathered from his decades of working for the Saints, to the archdiocese.

Ms. Benson thanked him and said that she would share his offer with Archbishop Aymond.

That exchange was the first of more than 300 emails, obtained by The New York Times, that show the Saints and the archdiocese working together to temper the fallout from a flood of sexual abuse accusations made against priests and church employees. The abuse accusations, which span decades, have led to dozens of civil lawsuits and out-of-court settlements, more than 600 claims of abuse in the archdiocese’s ongoing bankruptcy case and a handful of criminal convictions, and are part of an international reckoning for the church.