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HOUSTON (AP) -- Houston coach Gary Kubiak says the NFL has upheld defensive end Antonio Smith s three-game suspension.

Smith was suspended Wednesday for the last two preseason games and Houston s season opener for hitting Miami guard Richie Incognito with the Dolphins player s helmet.

Smith appealed the suspension, but his appeal was denied Friday. Kubiak says he s disappointed in the decision, but that the team understands and accepts it.

Smith ripped the helmet off Incognito s head, then hit Incognito on the shoulder with it Saturday night in the teams preseason game.

The two also went at it in last season s opener, when Smith kicked Incognito, drawing an $11,000 fine. Smith later said Incognito deliberately tried to twist his ankle while holding his legs in the 2012 game.

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