• Memo comes after arrests of two prominent figures

• Betting has caused issues across US sports

The NBA, in reaction to the arrests of Miami guard Terry Rozier and Portland coach Chauncey Billups last week for their alleged role in gambling schemes, has started a review of how the league can protect not just the integrity of the game but its players and coaches as well.

The league made those revelations in a memo sent to all 30 teams, a copy of which was obtained by the Associated Press.