NEW YORK -- New England wide receiver Terry Glenn has sued the NFL, claiming a disability makes it difficult for him to adhere to certain rules in the league's substance abuse policy.

The NFL said it is aware of the complaint, filed with the Equal Employment Opportunity Commission in Buffalo last week, but the league would not comment.

Glenn filed the complaint under the Americans with Disabilities Act, but it did not specify what disability Glenn suffers.

Glenn claims he should not have been suspended by the NFL for the first four games of the season for violation of the substance abuse policy. He missed a drug test, left the team without permission the day the suspension was announced and then was suspended for the season by Patriots coach Bill Belichick.

That suspension was overturned by an arbitrator, allowing Glenn to return in Game 5, when he caught seven passes for 110 yards and a touchdown against the San Diego Chargers.

Glenn since has missed two games with a hamstring injury.

Still unresolved is whether the team was allowed to withhold a signing bonus of nearly $9 million because of the league suspension.

Patriots spokesman Stacey James also declined comment on the Glenn lawsuit.

"That goes through the league," he said.