
12. Brett Favre
It’s easy to forget that Favre didn’t start his career in Green Bay. The Atlanta Falcons made him their second-round pick in 1991. However, the rookie had a difficult first season and the Falcons gave up on him. They traded him to the Packers for a first-round pick the following year. This was incredibly short-sighted because Favre had potential.

In the end, he made a mockery of their decision. Favre famously won a Super Bowl with Green Bay and became a true star. He helped them to the postseason many times and was one of the league’s best quarterbacks. Favre was also part of another blockbuster trade when he joined the New York Jets. That came after the Packers went all-in on Aaron Rodgers (via Madison.com).