Editor's note: This piece originally ran May 22 and has been updated with Monday's news that the league is investigating Isaiah Rodgers of the Indianapolis Colts, reportedly for wagering on the Colts, according to SportsHandle.com.
Regulated sports betting is spreading rapidly around the nation, and the NFL is trying to stay ahead of potential problems with increased monitoring and education, while hoping stiff penalties act as a deterrent. Recent events suggest the enhanced measures are warranted.
In the wake of five players being suspended in April, the NFL is investigating a second wave of potential violations of its gambling policy, multiple sources told ESPN.