NFL free agency can provide a quick fix for teams facing a pressing need, and the Bears and Cardinals were among those who paid up to solve a problem.

After one day of free agency moves, five teams stand out as being the most improved so far. Some of these teams were not good last year and are seeking more competency, while others are pushing for increased playoff standing, whether winning their division or competing for a championship.

NFL league year began March 12 with the tampering window opening spending on March 10. Here's who has the most salary cap space and least.