One need not be as big as Rob Gronkowski to train like him. The New England Patriots tight end now has a signature sneaker line to his name, as Nike released the Zoom Train Toranada “Gronk” for sale to the public Saturday. After days of teasing, Gronkowski and Nike shared photos of the sneaker in various colors on their respective Twitter accounts. The “Gronk” men’s training shoe is listed at $ 110. Features include “stability and responsive cushioning thanks to an adjustable midfoot strap and a Nike Zoom Air unit under the heel,” Nike says on its website. “Forefoot flex grooves and engineered mesh deliver a lightweight, natur... NESN.com