Rob Manfred said relocating the Oakland Athletics to Las Vegas is viable if they are unable to make progress on a new stadium in the area. 

The A's current lease at what is now called RingCentral Coliseum runs through 2024. Manfred said calling the Vegas alternative a bluff "is a mistake."

"Las Vegas is a viable alternative for a major league club, and there are other viable alternatives that I haven't turned the A's loose to even explore at this point," Manfred said during a Q&A session with members of the Baseball Writers' Association of America on the morning of the All-Star Game.