Tony Romo, playing while hurt, led Dallas to back-to-back wins last month. However, last Sunday, Tony Romo and the Cowboys blew a big lead and lost to the Lions.
Three years later, Drew Bledsoe was the Dallas starting quarterback in 2006, until he was replaced by Romo. The Cowboys proceeded to reach the playoffs, where they famously flamed out against the Seahawks when Romo couldn't handle the snap on a field goal attempt.
Since then, there have been two other trips to the NFL postseason with Romo at the helm, but still no Super Bowl championship for the Cowboys.