If the Raiders strike a deal with Oakland to build a new football stadium on the exact footprint of the current Coliseum (which is reportedly their preference), then the A's might have to find a temporary home while their new ballpark is built. The Raiders would have the same problem, since there's no way the construction could take place in a single NFL off-season. But they would have the option of temporarily playing at the 49ers' new Levi's Stadium.

Similarly, the A's could play a season or two at AT&T Park. San Francisco Giants CEO Larry Baer recently said his team would be happy to share its home for a season or two if the A's were building a ballpark in Oakland or elsewhere in the East Bay. If the A's win permission from Major League Baseball to move to San Jose, which so far has been denied them, the Giants might not be so hospitable, since Santa Clara County is currently designated as Giants territory.

That's where the option of a temporary stadium would come in. Rhamesis Muncada of newballpark.org described how the new minor league soccer team Sacramento Republic FC is building such a facility at the state fairgrounds and suggested that could be a model for the A's.

But that seems like a big stretch for a major league team. Not only Major League Baseball but the players' union would want to get involved to be sure the games played and stats recorded in a temporary park would be comparable to a permanent one. And building a safe facility in a seismically active region isn't any easier simply because the structure is temporary.

Meanwhile, the city of San Jose's legal battle with Major League Baseball shifts to the 9th U.S. Circuit Court of Appeals.

You may remember that last year, San Jose got tired of waiting for baseball and its commissioner, Bud Selig, to make a decision on whether the A's would be allowed to move to San Jose, and filed a lawsuit. Last October, a federal court judge in San Jose dismissed the suit's challenge to Major League Baseball's antitrust exemption (a second part of the suit, alleging that baseball officials broke state law by interfering with the city's contract with the A's, was allowed to proceed). U.S. District Court Judge Ronald Whyte ruled, in effect, that it's up to Congress, not the courts, to deal with the antitrust issue.

The city appealed Whyte's antitrust ruling and last week filed an 83-page brief arguing its case.

To get more perspective on how the city is going to press its antitrust claim, I talked to lawyer-turned-sportswriter Wendy Thurm.

Thurm: San Jose appears to be taking the position that the scope of the antitrust exemption is a question of fact, for a jury to decide. That's pretty unusual. It's not something that San Jose argued in the district court. I can understand from a strategic perspective why San Jose would do that, because it allows the court of appeal, if they're so inclined, to take an intermediate step and send the case back to the district court. And then it would open it up for discovery, back in the district court, which would lead to a whole range of documents and sworn testimony from MLB executives. I've never seen that argument before, and it strikes me as a bit of a Hail Mary pass.

Thorsen: That's been a theory when people talk about this case — that MLB will do anything to avoid discovery, that they don't want to open up their books, that Bud Selig doesn't want to go into court. Do you think there is that much that's shocking or proprietary about baseball's inner workings that they want to conceal?

Thurm: I've always heard that speculation, too — that not just MLB, but the individual owners would much prefer to keep their financials private, and the owners would pressure MLB to get rid of the lawsuit, down the road if it ever came to that. There's the additional pressure point, for the league as a whole, of putting the antitrust exemption at risk. Major League Baseball is the only one of the four professional sports that still hangs on to this exemption from antitrust law, and in particular as it relates to team location and relocation. MLB doesn't want to lose that, and has had to fight for it in Congress and in the courts. They're a long way from having to give up documents or losing that exemption, but I see both those as pressure points. Which is why the way the district court case played out really couldn't have been any better for Major League Baseball.

Thorsen: By dismissing it quickly?

Thurm: Yes. Now San Jose was successful in getting an expedited appeal, and I was quite surprised that the 9th Circuit agreed to do that. So what normally would take a year to 18 months, between the briefings, and being assigned to a panel, and having oral arguments -- that process is going to move along much more quickly in the 9th Circuit, and we're likely to get at least an initial decision sometime this fall.

Thorsen: So do you have a guess about what's likely to happen?

Phoenix Municipal StadiumPhoenix Municipal Stadium

A's Ballpark Update: Legal Moves and a Thorny Stadium Puzzle