Zach Z.: Not that it's a great measure, but do you have any idea where I could find a statistic that measures how many Interceptions each quarterback has thrown in the red zone? I have a co-worker who is against Favre coming back to Green Bay, and after I debunked most of his reasons he's hanging his hat on "Favre throws too many interceptions in the red zone," despite having no idea if he's actually higher or lower than any other quarterback.
There doesn't seem to be anything special about Favre throwing more interceptions in the red zone than he does elsewhere. He had only one red zone interception during the 2007 regular season. He had four the year before, which was second in the league, but he had only two in 2005 (the year he led the league in total interceptions by leaps and bounds) and only two in 2004.
In fact, there's no evidence that any quarterback has a particularly unique record of throwing interceptions in the red zone (as opposed to elsewhere on the field). Eli Manning tied for the league lead with four red zone interceptions last year. He didn't throw a single one in 2006. No quarterback has thrown more than two red zone interceptions in each of the last two years, and only four quarterbacks threw more than one red zone interception in both seasons: Jon Kitna, Tony Romo, Ben Roethlisberger, and Peyton Manning. Not exactly a Murderer's Row of Suck, is it? In fact, Peyton Manning has nine red zone interceptions between 2004 and 2007, tied with Favre and brother Eli for the highest total in the NFL over that four-year span.
If your friend thinks red-zone interceptions are the main reason why Favre shouldn't come back, I hope he doesn't try arguing football with anyone from Indianapolis.