Ticketmaster will launch a Web site next year for the resale of tickets to pro football games.
The event ticketing company says it has signed a multiyear deal with the NFL that includes branding and promotion for the site.
Ticketmaster already operates separate ticket exchange sites for 18 NFL teams, through which computer users can resell their game tickets.
The latest deal moves those teams and adds four others to the new portal set for debut sometime next year.
This is the latest push by Ticketmaster into the lucrative secondary ticket market.