Peyton Manning was poised to turn one of his worst games into one of his most memorable. Then Adam Vinatieri missed a 29-yard field goal attempt with 1:31 left, and the San Diego Chargers held on for a wild 23-21 win over the defending Super Bowl champion Colts on Sunday night. Manning, who set a Colts franchise record with six interceptions, had driven the Colts to the Chargers 12.