Updated

The National Football League may have more to deal with than just tackling the lockout.

NFL attorneys are investigating why a porn industry event used several NFL players in its advertisements, according to WLS-TV in Chicago.

The ads for last month's Exxxotica Expo 2011 in Miami featured Chicago Bears' Major Wright, Houston Texans' Kareem Jackson, Oakland Raiders' Jacoby Ford and Kansas City Chiefs' Brandon Flowers and Eric Berry. The ad claimed the five were the "hosts" of the event, according to Fox Sports.

"Our legal team is reviewing the ad. In general, companies not affiliated with the NFL or its clubs may not depict a player in his uniform," NFL spokesman Brian McCarthy told the Chicago station.

A Bears spokesman told the station they are "not associated with the ad."

"This is an improper use of team marks," spokesman Jim Christman told WLS-TV.

He also says that "many times players themselves are unaware of the violation and companies simply pull images and make ads not realizing they are in violation."

Wright was unable to be reached for comment, but Berry's agent tells arrowheadpride.com that his client had nothing to do with the event.

"Eric did not attend and had no knowledge of this event, and he certainly did not approve the use of his name and image in connection with the party," agent Chad Speck told the website.

The porn convention -- billed as the "love and sex expo" -- will take place in Chicago next month.