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7/2/2014 10:06 P.M. ET

A's stadium lease deal reportedly in jeopardy

The A's attempts to move forward with a lease extension that would keep them at the O.co Coliseum while Major League Baseball continues to analyze the club's stadium options has hit a road block.

Come Thursday, four members of the Oakland-Alameda County Coliseum Joint Powers Authority are expected to reject a 10-year lease deal that reflects the efforts of more than a year's worth of negotiations with the A's, according to reports.

This could determine whether the city loses the A's entirely. If the proposed deal goes south, the A's would remain in Oakland for at least another 18 months, when the current lease expires, but they would be free to move thereafter.

The club declined to comment on the matter Wednesday evening.

The Oakland City Council is reportedly opposed to the deal, particularly with lease payments expected to decrease rather than increase over the course of the 10-year term, and it has ordered two of its members to present the Coliseum board that they serve on with a new proposal Thursday.

But A's owner Lew Wolff, who signed off on the proposed extension, told The San Francisco Chronicle on Wednesday he will not consider a revised lease.

"We believe in our dealings with the JPA. We are 100-percent finished," Wolff told The Chronicle. "We have a 14-month negotiation finished and approved by Major League Baseball and the JPA. If someone wants to do something else, we have no interest in that."

The current 10-year proposal not only includes a $10 million new scoreboard system but several provisions to benefit Oakland, including rent waivers if the team moves to another stadium within the city. Moreover, if the team desires to break the lease, as it is allowed to do after 2018, the A's would be required to give two years' notice and also continue paying a minimum of $1.25 million annual rent to the Coliseum.

Potential delays in agreeing to a deal could threaten all of it since a new scoreboard must be agreed to by Aug. 1 if it's to be ready for next season.

Jane Lee is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.