When do George Strait tickets go on sale?

I heard on the radio this morning (99.9 Gator Country in Jax, Fl) that his tickets go on sale this saturday at 10am, but I'm seeing some already on the web for sale. But I go to ticketmaster and there's no tickets for sale in Jax yet. What does that mean? Are some tickets available first and some come out later for other locations? or what? I'm confused.

Tickets are available at the Jacksonville Veterans Memorial Arena Box Office 10am-4pm (M-F). Or visit your ticketmaster outlet: To charge call (904) 353-3309

December 15th for his January 19th concert in central FL.