NFL updates gambling policy, reinstating Lions WR Jameson Williams and Titans OL Nicholas Petit-Frere.

The changes include stricter penalties for betting on NFL games.

Players who bet on their own team face a two-year suspension.

Lifetime ban for actual or attempted game fixing.

Inside information sharing results in indefinite suspension.

Reduced penalties for betting on other sports at work.

First-time offenders face two-game suspensions.

Self-reporting and cooperation can lessen penalties.

These changes affect only Williams and Petit-Frere.

NFL and NFLPA prioritize protecting game integrity.