Aaron Rodgers threw five touchdown passes as the Green Bay Packers steamrollered the Kansas City Chiefs 38-28 to maintain their 100 percent start to the season at a rainswept Lambeau Field on Monday.

Packers quarterback Rodgers was at his imperious best as Green Bay romped away to a 38-14 lead early in the fourth quarter before the Chiefs added two late touchdowns to give the scoreline a flattering look.

Packers receiver Randall Cobb was the grateful recipient of three of Rodgers' touchdown passes as the Chiefs defense was pierced at will by the home side, runners up in last season's National Football Conference championship game.

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The Chiefs, who fell to 1-2, were undone by a string of errors, handing the Packers no fewer than five first downs in the first half alone through penalties. Rodgers' passing masterclass was the fourth time he has thrown for five-or-more touchdowns in a single game.

Only New Orleans quarterback Drew Brees, with five, has accumulated more. Rodgers finished with 24 completions from 35 attempts for 333 passing yards. "I just think we're scratching the surface a little bit," Rodgers said afterwards.

"It starts with the guys up front. They've been blocking really well. We have three games in, we've got three sacks. That's pretty impressive. If those guys keep blocking like that we're going to be tough to beat."

The display also extended Rodgers formidable record at Lambeau. The Packers quarterback has now gone 1,030 days and 580 passes since he last threw an interception at home.