OAKLAND, Calif. (AP) A San Diego businessman says his latest plan for a new Raiders stadium in the city of Oakland has a 50-50 chance of succeeding, but he's revealing little else about it.

Floyd Kephart's proposal first called for the Raiders, the NFL and future stadium revenues to finance the proposed $900 million facility.

The Oakland Tribune reports (http://bayareane.ws/1V8yqvX) an undeterred Kephart refused Tuesday to release his latest proposal, but hinted at several changes from his original plan.

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He says that there would be no attempt from his investors to purchase a piece of the Raiders. Originally, he proposed the team selling a 20 percent stake for $200 million with half of the sale price going toward stadium construction.

The Raiders also are working with the San Diego Chargers on a $1.7 billion stadium in the Los Angeles suburb of Carson.

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Information from: The Oakland Tribune, http://www.oaklandtribune.com