LERONE MARTIN: He's known as the Happy Am I preacher, so he has this kind of charisma, smiling, very happy. My name is Dr. Lerone Martin, and I am the director of the Martin Luther King Jr. Research ...

And be sure to check out CBS Sports' updating tracker of the top 100 NFL free agents. The top 16 players on Pete Prisco's top 100 list have already been signed, but there's still plenty of talent ...