Hageman was arrested last year on domestic violence charges stemming from an alleged incident with his then-girlfriend.
According to a police report from DeKalb County, Georgia, obtained by The Associated Press, Hageman faced misdemeanor charges of battery, cruelty to children and interfering with calls for emergency assistance stemming from a March 2016 incident at the home of Janeal Jefferies. Her son was present at the time, according to the report.
The league had placed him on the commissioner's exempt list as a result of domestic-violence-related charges.
The Falcons terminated Hageman's contract earlier this month, letting go of a player who was set to be their backup nose tackle. His deal had a year and $1,147,614 remaining on it.
Hageman currently is a free agent. He does not need to be on a team to serve the suspension, the league said.
Information from ESPN.com's Vaughn McClure was used in this report.