We have known for a while that the Motorola Moto X would be launching on all four major carriers in the U.S. as well as some of the larger regional carriers like U.S. Cellular. With today's announcement, Motorola did mention that the device would cost $199 on contract through carriers, but left it up to the carriers themselves to announce when the device would launch...
Source: http://www.phonearena.com/news/Sprint-announces-Moto-X-coming-this-summer-for-199_id45976
Source: http://www.phonearena.com/news/Sprint-announces-Moto-X-coming-this-summer-for-199_id45976