CHICAGO (AP) — Chicago Cubs chairman Tom Ricketts says the video board he wants to build Wrigley Field is needed to "generate revenue" and he raised the prospect of moving out of the ballpark entirely if he is blocked from doing so.

After a Wednesday speech at the City Club of Chicago, Ricketts says if the team is prevented from making advertising money from "our own outfield" he'd consider moving. He also says he is committed to working out an agreement that would allow the team to stay at Wrigley.

During his speech, Ricketts said the Cubs could be making $20 million a year more in ad revenue.

Rooftop owners, who charge fans for access to watch games, have vowed legal action if the Cubs build anything that blocks their views.

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