The free-agent cornerback was already reportedly banned for the first four games for violating the NFL’s substance-abuse policy, though it’s unclear what’s caused the increased punishment.
As with all year-long suspensions, Gilbert is essentially on an indefinite hiatus and will need to apply for reinstatement if he wants to continue his career.
Gilbert was traded to the Pittsburgh Steelers in September, but was released in February after failing to carve out a significant role.
The 25-year-old was selected eighth overall by the Browns in the 2014 NFL Draft.
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