The 24-year-old Humber recorded 21 tackles and a sack last season in 13 games with three starts for the Saints.
Humber is a free agent, and the Saints have not given him an offer. He will have to serve his suspension with whichever team that signs him.
The 5-foot-11, 232-pounder from North Dakota State has a previous stint with the Indianapolis Colts, where he began his NFL career.
In four NFL seasons, Humber has registered 57 career tackles with one forced fumble.
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