KANSAS CITY, Mo. (AP) — Justin Houston wasn’t supposed to be on the field at the end of the game.Chiefs coach Andy Reid had pulled most of his starters in the lopsided win against St. Louis, and his star pass rusher was supposed to be next to him on the sideline. But when Josh Martin hurt his hamstring late in the fourth quarter, Houston quietly slipped back onto the fieldNaturally, he went ahead and bagged one more sack.“He kind of snuck in there at the end of the game,” Reid said with a grin. “I just thought all along the front, we played very aggressive.