Members of Congress sent a letter Friday to NBA commissioner Adam Silver requesting a briefing and expressing concern over "allegations of illegal gambling and sports rigging" after Portland Trail Blazers coach Chauncey Billups, Miami Heat guard Terry Rozier and former NBA player and coach Damon Jones were indicted in a pair of sweeping federal investigations this week.

The bipartisan letter, signed by six members of Congress on the House Committee on Energy and Commerce, requested a briefing with Silver by Oct. 31.

ESPN has reached out to the NBA for comment.

The committee, which oversees consumer protection and sports, said in its letter that it has previously investigated "steroid use in Major League Baseball, anti-doping measures at the Olympic Games and the sexual abuse o

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