The Indianapolis Colts wanted Sunday to be a playoff tuneup. Instead, the Super Bowl champs turned it into an offensive showcase. Peyton Manning threw three touchdown passes; Joseph Addai and Clifton Dawson ran for TDs; and the Colts scored on six of their first eight possessions in a 38-15 rout of Houston. In what was likely to be the last significant action for Indy's starters until mid-January when the AFC's No. 2 seed will play in the divisional round of the playoffs, Manning & Co. finished with 458 yards and scored 38 unanswered points, winning their sixth in a row. The Super Bowl MVP was 28-of-35 for 311 yards with a rating of 132.3 before leaving late in the third quarter. Three Indy running backs -- Addai, Dawson and Kenton Keith -- combined to give the Colts (13-2) their first 100-yard rushing day since Thanksgiving night, and Dallas' Clark broke the single-season franchise records for receptions and touchdown catches by a tight end.