The story of “King,” who doesn't disclose his real name, is similar to that of many vulnerable Brazilians in recent years.

Brazil has become the third-biggest market in the world for sports betting, following the U.S. and the U.K., a report by data analysis company Comscore said last year.

Despite having immense talent at his disposal with Team USA, head coach Steve Kerr chose to limit NBA star Jayson Tatum's ...