Don Banks of SI.com gives his thumbs up and down to those NFL teams that have made moves in free agency thus far.

Thumbs down:
Oakland Raiders — Where to begin? The Raiders gave defensive end-turned-tackle Tommy Kelly more than $18 million guaranteed despite the fact that the onetime undrafted collegiate free agent played just seven games last season and is coming off ACL surgery. They paid a steep price as well for receiver Javon Walker, who has had three knee surgeries and is said to be playing with a bone-on-bone situation in one of his knees. And they added ex-49ers offensive tackle Kwame Harris, a former first-round pick who couldn’t even stay in the lineup for San Francisco’s less-than-dominating offensive line last season.

Couldn’t agree more. Kelly and Walker are good players, but they’ve got GIGANTIC injury concerns. Plus, in an offseason where teams have been reluctant to overpay for free agents (unlike last year), the Raiders have handed out money like the Olive Garden hands out breadsticks.