"More than 30 years ago, the NFL sued unsuccessfully to stop Delaware from implementing its "Scorecard" lottery, which allowed bettors to wager on pro football contests via several parlay-card formats. However, Scorecard was scrapped after only one season. According to The New York Times, the game was cancelled on December 11, 1976 after wagering on "Touchdown 2," which required bettors to pick games against the spread, increased threefold over the previous week. The reason wagering soared? Sone of the Delaware lottery's lines differed significantly from those set in Las Vegas, a dream scenario for sharp gamblers. According to the Times, the state's attorney general ruled that the state's lottery commission still had to pay out the winning bets, which caused the commission to have to draw on its emergency funds."
https://www.profootballweekly.com/2009/05/15/nfl-will-fight-delawares-sports-wagering-law
Also, newspapers reported that the Arizona State point shaving scandal was finally investigated when Las Vegas oddsmaker Ivan Mindlin call NCAA commissioner David Price.