Casey tells CNN that "I'm going to take a fine this year, why not? I'm going to protest during the flag. That's what I'm going to say now."
Titans officials had no immediate response.
The NFL approved a policy in May allowing players to protest during the national anthem by staying in the locker room but forbidding them from sitting or taking a knee if they're on the field.
The NFL Players Association has filed a grievance with the league to challenge the policy.
Casey raised a fist at the end of the national anthem before games last season.
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For more NFL coverage: http://www.pro32.ap.org and http://www.twitter.com/AP_NFL
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Information from: CNN, http://www.cnn.com
