Oakland's shot at retaining Josh Willingham is slipping away, quite possibly for good.

Willingham's agent, Matt Sosnick, told The Chronicle on Saturday that he approached the team last week with various possibilities for a multiyear deal for their top offensive player, and general manager Billy Beane told Sosnick that spending decisions are on hold until a decision comes down about the A's stadium situation.

"We gave the A's an idea of where we were, and we were told they have interest in bringing Josh back, but before they did anything, they want to see what happens with the stadium," Sosnick said. "Josh and I both made it clear he'd like to stay, but at this point, I'm pretty sure he'll test the free-agent market.