Los Angeles FC has shifted its primary ticketing to Ticketmaster after using SeatGeek for its inaugural season last year. Season-ticket holders have been notified of the switch, and single-game sales have begun on the team's website. The club did not comment on the reasoning behind the move. But SeatGeek’s signing of LAFC in late 2017 was a key part of a broader move into soccer by the New York-based company that included a league deal and individual ones with clubs such as the Sounders,…