Tyler Andrews: It's a long route from Tufts, to South America to world-record holder (on a treadmill) for the half-marathon to the 2014 Boston Marathon

Tyler Andrews' first marathon will be the 2014 Boston Marathon, the granddaddy of 'em all. It's a dream come true for the kid from Massachusetts. My story for ESPN.com's Endurance Sports section: http://espn.go.com/sports/endurance/story/_/id/10798994/endurance-sports-tyler-andrews-go-treadmill-record-boston-marathon