The NFL free agent signing period was fast and furious this year due to the NFL lockout.
A few teams have seen their free agent signing pay dividends.
The New Orleans Saints signed running back Darren Sproles to a four-year deal. Sproles has six touchdowns so far.
The Tennessee Titans signed quarterback Matt Hasselbeck to a three-year deal and it has paid off. Hasselbeck has thrown for 13 touchdowns on the season.
Not all teams have been so lucky. A number of teams signed free agents who just have not panned out.
Here are 10 teams who have some regrets.