Sneak peek at new Robert Griffin III spot

Robert Griffin III likely will be unveiled as Washington's new quarterback later this month. Today, adidas unveiled a new shoe, the adizero Sonic 3, with Heisman-winning ex-Baylor star RG3 as its main pitchman. It also gave us a sneak peek at the new spot for Dick's Sporting Goods, which hits the airwaves on April 21.