The Los Angeles Rams signed cornerback Sam Shields on Thursday. The former Green Bay Packer has been a Pro Bowler but spent most of the last two years away from the NFL because of concussions. Here's a closer look at the signing:
Grade: B. This is a prototypical low-risk, high-reward signing. The Rams are buying low on Shields. If he gives them anything close to what he gave the Packers earlier in his career, it's a steal.
What it means: The meaning of this signing changed completely in a matter of hours.