Since receiving permission to explore relocation, the Marlins visited San Antonio and Portland, Ore., but not perceived front-runner Las Vegas. And now we know why: Major League Baseball is not allowing it, at least not yet. We hear MLB's executives so far have scuttled the Marlins' desire to meet with Las Vegas officials for a second time. (Last December's visit was an introductory meeting long before Florida received permission to explore relocation.) The Marlins and MLB wouldn't comment, but it's believed MLB still has big concerns about placing a team in a gambling mecca. Still, it would be a bit surprising if MLB doesn't allow a meeting eventually. Vegas officials have reached out directly to Marlins owner Jeffrey Loria, but Loria's hands are tied. Though Vegas Mayor Oscar Goodman has suggested stadium financing wouldn't be a problem (he has never offered specifics), none of the Marlins' other suitors has offered a better financing package than the one available here. ? An undisclosed Miami businessman (not Venezuelan media mogul Gustavo Cisneros) submitted an offer to buy the team, but Loria won't consider selling.