Diamondbacks signed C Henry Blanco to a minor league contract. The 42-year-old backstop will receive an invitation to spring training as well. While he was productive in a reserve role with the D'Backs in 2011, his offense has really taken a dive, slashing a brutal .157/.227/.258 with four homers and 21 RBI in 71 games the past two seasons. He'll compete to be the primary backup behind Miguel Montero.