The FBI has arrested Chauncey Billups, NBA champion, Hall of Famer, and coach of the Portland Trail Blazers for his association in a rigged poker game operated by some of New York City’s most notorious crime family. “Why would Chauncey do it?” the world of sports is asking. He’s already worth tens of millions of dollars. That’s a question for Billups, his attorneys, his God, and, presumably, Blazers ownership to answer. But as someone who regularly plays a lot of low and micro-stakes poker, I have a pretty good idea. The games I play in are monitored by security cameras,...