The extension further ratchets up the border war between Missouri and Kansas over where the two teams should build their futures.

The State of Kansas has extended its offer to emphasize the "Kansas" in the names of the Kansas City Royals and Chiefs. The state is attempting to lure both teams as the Chiefs and Royals continue their protracted stadium negotiations with Missouri.

The teams have already had one year to negotiate with Kansas officials. But supporters say the deals are complicated — and are frustrated by delays.