Rightfully so, fans spend a majority of the NFL offseason salivating over the draft and the first wave of free agents signed. However, championships aren't won by spending big in free agency; just ask the 2011 Philadelphia Eagles.
Super Bowl-caliber teams always have a deep roster that can keep going full steam ahead if injuries do occur. Those teams seem to dominate the second and third weeks of free agency as well.
It's no coincidence, so let's take a look at 10 of the top under-the-radar free-agent signings.
All statistics compiled with the help of Pro Football Focus' premium subscription area.