November’s Taylor Swift presale ticket debacle was the focus of Tuesday’s Senate Judiciary Committee hearing, although Ticketmaster’s dominant position in sports also drew scrutiny.

SeatGeek co-founder and CEO Jack Groetzinger told the committee that Ticketmaster controls ticketing for more than 80% of NFL, NBA, and NHL venues. Outside SeatGeek’s deals with the Arizona Cardinals and Dallas Cowboys, Ticketmaster has agreements with all the other NFL teams, giving the industry giant a nearly 94% stranglehold, according to data provided by music promoter Jerry Mickelson at the hearing.

“You have clear dominance. Monopolistic control,” said Sen. Richard Blumenthal (D-Connecticut). “This whole concert ticket system is a mess, a monopolistic mess.”