OAKLAND -- A's owner Lew Wolff wasn't ready Thursday to sign off on changes Oakland council members inserted into a lease agreement they approved hours earlier, but, in a departure from recent statements, he said he'd give them serious consideration.

Wolff's apparent change of heart left city officials hopeful that after several months of rancorous negotiations a deal was finally in place that could keep the team in Oakland for another decade and set the stage for talks about a new ballpark at the Coliseum complex in East Oakland.

It also appears that as Wolff considers making a long-term commitment in Oakland, he could become a factor in the city's upcoming mayor's race as he again singled out for praise one of Mayor Jean Quan's top challengers.

Until Thursday, Wolff has been adamant that he was done negotiating the lease deal, which already had received initial approval by the Oakland-Alameda County Coliseum Joint Powers Authority. He even sent city officials an email shortly before they debated the lease Wednesday stating that "if we are not able to obtain a majority, non-contingent vote, there is no need for any further discussion."

Wolff said his willingness to now consider the lease amendments was in part due to a call he received after the vote from Councilwoman Rebecca Kaplan, who has forged a strong relationship with him. "Just based on her asking me alone is enough for me to tell (team President) Mike (Crowley) and the guys to look hard at it," he said.

Wolff's recent embrace of Kaplan, who is running for mayor, comes as his relationship with Mayor Quan appears to have further deteriorated. In his Wednesday email to city officials, Wolff wrote that "the almost daily inconsistency and misstatements of Mayor Quan are absolutely unacceptable. Her attributing comments to me that I have never made are equally distasteful." Wolff declined Thursday to specify which statements from the mayor had upset him.

Nonetheless, Wolff also indicated Thursday that the council's vote and the testy lease negotiations that preceded it would not preclude the A's from one day building a new ballpark in Oakland. "Every day the sun comes up, I'm willing to move forward instead of backward," he said.

The lease revisions don't alter the economics of the proposed 10-year lease deal.

The most substantive change specifies that the city and Alameda County, who jointly own O.co Coliseum, would not be held liable for lease violations by the Oakland Raiders. A violation could include the Raiders signing a sponsorship deal with a company when the A's, who control certain sponsorship monopolies at the Coliseum, have a deal with a competitor.

If the A's agree to the city's modifications, the amended deal could go to the Alameda County Board of Supervisors later this month for final approval. The county could also approve the deal already agreed to by the Coliseum board, putting more pressure on the city to drop its proposed amendments.

The council voted 5-2 Wednesday to approve the revised lease. Three council members -- Larry Reid, Noel Gallo and Kaplan -- would have supported the deal without any revisions.

After Crowley said the team was "disappointed" by the vote late Wednesday, both Kaplan and the Coliseum board's attorney, Jon Streeter, reached out to Wolff.

Councilman Reid, who warned his colleagues against revising the lease, said Thursday that he was now "very optimistic" that the A's would sign off on it after talking to Streeter.

The 10-year lease deal would lower the A's rent and require them to make a "good faith" effort to build a new ballpark in Oakland after trying to leave town for nearly a decade. Both sides have escape clauses with the A's able to leave after the 2018 season.

Council members reluctantly agreed to the terms after being divided for weeks between one camp that thought the city was getting shortchanged and another that said the deal was an important first step to getting the A's to seriously consider building a new stadium in Oakland.

Kaplan helped negotiate the lease with Wolff, who has been highly complimentary of her since those talks. Quan, on the other hand, pushed for more concessions from the A's and has championed a private redevelopment of the Coliseum complex, backed by the Raiders, that Wolff has said he's not interested in joining.

Quan declined to respond to Wolff's email statements about her. Reid, who has quarreled with Quan over the lease talks, said, "It's clear where Mr. Wolff is in regards to the mayor's race. He's not giving Mayor Quan credit for anything and rightly so."

Contact Matthew Artz at 510-208-6435.