Cincy
1992
His rookie year was with the Falcons in 1991, but his first year with the Packers was 1992.
On September 27, 1992, Brett Favre of the Green Bay Packers started against the Pittsburgh Steelers in a game played at Lambeau Field. The Packers won 17-3. The game began Favre's record streak of 297 consecutive regular-season starts, which ended on December 13, 2010. Brett Favre was drafted and played his first NFL game for the Atlanta Falcons.
He made a game winning touchdown pass when the first string QB got an ankle injury making the Green Bay Packers pay bug bucks to trade for Brett,
Yes, Brett Favre played the whole game in Super Bowl XXXI. He was the only quarterback the Packers used in the game.
The Packers first game of the regular season was played September 9 against the Philadelphia Eagles. The Packers won 16-13.
Greg Jennings on September 30, 2007 in a game between the Packers and Vikings.
Through the 9th game of the 2007 season, Brett Favre has 60,257 yards passing
Bears
Brett Favre played with the Packers for 16 seasons. He was drafted in 1991 by the Falcons; traded to the Packers in 1992; started his first game on September 27, 1992 against the Steelers; retired from the Packers on March 4, 2008 after the 2007 season; came out of retirement to play for the Jets in 2008, and then became a world-class-traitor when he signed with the Vikings on August 18, 2009.
The Packers won their first NFL game on October 23rd 1921 beating the Minneapolis Mariners 7-6!
September 9: Packers 16, Eagles 13