Andrew Luck, the number-one overall pick out of Stanford in the 2012 NFL draft, didn't take long to show why the Indianapolis Colts made him the successor to Peyton Manning.  On his first pass in the Colts' 38-3 preseason mauling of the Rams, Luck connected with Donald Brown on a 63-yard touchdown.  Luck finished 10-for-16 with 188 yards, two touchdowns and no interceptions in his first pro game.