Long-simmering fears over America’s sports-betting boom erupted into scandal overnight as FBI agents arrested two high-profile NBA figures, including Hall of Fame guard and Portland Trail Blazers coach Chauncey Billups, who authorities said was involved in a mob-run, rigged poker scheme and supplied information to sports bettors about his team.

Billups was arrested in Portland, Oregon, just hours after his Trail Blazers team lost its season-opening game Wednesday night.

He was charged with money laundering and wire fraud conspiracy over his alleged participation in rigged poker games that also involved members of Mafia crime families, also called La Cosa Nostra.

Agents also arrested Miami Heat player Terry Rozier, a former first-round draft pick, in Orlando. Authorities allege he partic

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