Michael Hickey/Getty Images Former Dolphins legend Xavien Howard announced his retirement Wednesday. Xavien Howard, the 32-year-old Indianapolis Colts cornerback who spent his first eight seasons with the Miami Dolphins , abruptly retired Wednesday. Howard posted a picture of himself in a Dolphins uniform alongside a statement that spelled out his rationale for calling it a career midyear. Howard had started each of the Colts ‘ first four games, posting 11 tackles and one fumble recovery while