Gallagher, who has been with the network since 2001, will continue to host The Mike Gallagher Show for Salem Radio Network through the duration of the deal.
Newsmax is offering a private investor offering for eligible investors in an effort to raise $225 million before beginning the process of going public.
"I think ESPN rightly wanted to own and operate and produce RedZone outright because of the galactic popularity of the show. But the NFL, for their reasons, wanted to retain control of the production of RedZone."