By Jared Keene NEFJ Correspondent MILFORD - Natick senior captains James Mortarelli and Jack Showstead are best friends both on and off the field. Off the field, they spend a ton of time together and do almost everything together. On the field, they happen to make up quite the 1-2 punch at running back for the Redhawks, always supporting each other and being the first ones to congratulate one another...