Not sure that it really needs to be defined as a sad day. The man is one of the greatest QB's ever, if not the toughest, and his legacy is largely untarnished. Brett Favre is leaving the game on his terms, and on a high note, having brought his team back from mediocrity to deep in the playoffs. Green Bay's record with Favre is the best in the NFL over his tenure, and his record for consecutive games is on a par with Cal Ripkin's streak. The man is heading straight for the HOF, and we are all better off for having been able to witness 17 years of class and competition personified.