I don't know much about football, but anybody who paid much attention to the 2008 football season saw how important a quality backup quarterback is to winning championships. Texas's other football team,* ironically referred to as "the Texans," decided to trade away their quality backup. Besides my burgeoning affection for the Other Texas Football Team, I point this out to you because I thought you'd be interested in what the Minnesota Vikings gave up: a fourth-round draft pick.
You read that correctly. Not two draft picks. Not a first-round draft pick. Not a player to be named later. "Mr. Rosenfels, we appreciate what you've done for us the past two years, but we think you're worth the equivalent of an unproven Division II left tackle."
But like I said, I don't know much about football.
*Texas's football teams being generally recognized in this order: Dallas Cowboys, UT Longhorns, A&M Aggies, Midland High, Baylor Bears, Houston Texans.