NEW YORK (Reuters) -U.S. authorities have arrested more than 30 people, including Portland Trail Blazers head coach Chauncey Billups and Miami Heat guard Terry Rozier, in connection with a federal investigation into illegal gambling, prosecutors said on Thursday.

Professional sports in North America have seen numerous examples of improper or illegal wagering among players from its earliest days to the modern era of legal betting.Here are some notable examples of sports betting scandals: