Miami Heat player Terry Rozier and Portland Trail Blazers head coach Chauncey Billups were arrested yesterday over their alleged involvement in illegal sports gambling and rigged poker games, according to two separate but related federal indictments that were unsealed. The cases, which involve dozens of defendants spread across multiple states, illustrate the delicate relationship sports leagues have with the sportsbooks that pay them millions in sponsorship deals but also pose a potential reputational risk.