Which NFL team won the QB derby?
McNabb, Kolb and others have switched teams. Will they help their new teams?
This period of free agency is historic in the sense that it's probably the first time in league history that the quarterback fortunes of nearly one-quarter of NFL teams have been affected in such a short span of time.
So, did those teams' fortunes change for the better or the worse? Would they have been better off letting a rookie QB play instead of using a veteran QB as a stopgap measure?
Let's take a metric look at some of the biggest impact moves to find out.
Arizona Cardinals -- Traded with Philadelphia to acquire Kevin Kolb
This might sound harsh, but Kolb's numbers from last year's don't exactly say he is a slam dunk improvement over Derek Anderson. Kolb's 6.2 overall yards per attempt (YPA) mark was the third lowest among quarterbacks with 175 or more pass attempts. (Note: The YPA totals throughout this article include penalty plays such as pass interference, illegal contact, etc.) He also fared quite poorly in the bad decision metric (a bad decision being defined as when a quarterback makes a mistake with the ball that leads to a turnover or a near turnover). His 4.0 percent showing in that category ranked tied for third highest in the league.
To read more about which teams helped themselves -- and which hurt themselves -- by acquiring QBs this offseason, you must be an ESPN Insider.
MORE NFL HEADLINES
- Union: NFL, Ravens not helping in Rice probe
- Colts WR Wayne won't play vs. Steelers
- Harvin wants to reach 'next level' with Jets
- Saints to be without RBs Thomas, Robinson
MOST SENT STORIES ON ESPN.COM
The NFL on ESPN.com
WEEK 1 PICKS
MORE NFL COVERAGE
2011 NFL PREVIEW
JOHN CLAYTON QB RANKINGS
- John Keim retweeted
- trey wingo retweeted