Philadelphia's Cliff Lee threw a complete game victory in his post-season debut. Philadelphia's Cliff Lee threw a complete game victory in his post-season debut. (Jeff Zelevansky/Getty Images)

Cliff Lee dominated the Colorado Rockies by tossing a six-hitter as the Philadelphia Phillies began their World Series title defence with a 5-1 victory Wednesday.

Raul Ibanez had two hits and two RBIs, and Ryan Howard and Jayson Werth drove in runs with key extra-base hits off 15-game winner Ubaldo Jimenez.

Lee, the reigning AL Cy Young Award winner, struck out five and had no walks in his first career playoff start.

He retired 16 straight batters at one point until Garrett Atkins hit a wind-blown double in the seventh.

Lee lost his shutout when Troy Tulowitzki singled in a run with two outs in the ninth.