Yet, as the Packers get ready to travel to "Space City USA" this weekend, they have been misfiring too much a month into the season.
"We're not the same team as last year, obviously," right guard Josh Sitton lamented after Green Bay had one of the most epic collapses in the club's illustrious 94-year history.
The Indianapolis Colts erased a 21-3 halftime deficit and scored a touchdown in the last minute to pull out a 30-27 win at Lucas Oil Stadium on Sunday.
"When you're up a few scores, we've got to close out the game," Sitton said. "Just poor execution in the second half. We've got to find a way to have a complete game."
The Packers haven't hit on all cylinders in any game in their surprising 2-3 start, which leaves them two games off the lead pace of Chicago and Minnesota in the NFC North. They ran away to the division title in 2011 with a 15-1 record.
"Ultimately, we're not where we want to be right now, and it's clearly evident with that performance," linebacker Clay Matthews said.
The last time Green Bay had such a colossal letdown the final two quarters of a game happened Nov. 17, 1957, when the Los Angeles Rams climbed out of a 24-3 halftime hole to win 31-27 at Milwaukee.
Head coach Mike McCarthy credited the Colts for their resiliency, particularly on an emotionally charged day when they played for the first time without their coach, Chuck Pagano, who is being treated for leukemia.
McCarthy, however, had some blunt words for how Green Bay finished the game.
"My football team is not playing the way we're capable of playing," he said. "I feel like we underachieved, to be frank, and it starts with me. That's my responsibility.
"When you're (ahead) 21-3 at halftime, you expect to keep that thing and keep going."
What irked McCarthy the most after the Packers' second loss in the final seconds in three weeks was their inability to hang onto the football - on offense and defense.
Aaron Rodgers threw an interception in the third quarter that helped fuel the Colts' big comeback.
The defense, which allowed rookie Andrew Luck to catch fire after a rough first half, came up with just one interception and had a few others slip through their fingers. Green Bay has only five interceptions this season after leading the league with 31 in 2011.
Now, Green Bay will try to keep its season from spiraling into orbit when it plays the high-flying Houston Texans on Sunday night.
"It's not really rocket science - we've got to win the next one," veteran defensive back Charles Woodson said. "We've put ourselves in a hole."