Surprise, surprise, surprise! Or maybe not. Anyone actually surprised that the Mafia has a significant influence upon sports is hopelessly naive - there’s HUGE money in not merely betting on games, but the players and their friends and acquaintances have a lot of it, too.
Gamblers fixing professional sports predates the mafia, and probably goes back to chariot races in ancient Rome if not earlier.
People can place bets on their phones anytime during a game...ever wonder why those winning field goals go donk.