Weekly Patriots mail is delivered

Every Tuesday on ESPNBoston.com, questions from Patriots followers are answered as part of a weekly mailbag. This week's mailbag has been posted, can be recpped here, and includes some of the following topics:

1. Concern over the receiver spot and if the Patriots are leaving themselves short.

2. Have the Patriots used their salary cap space wisely?

3. Could a couple of former Raiders defensive linemen help?

4. Looking at players whose contracts expire after the 2013 season who might be in line for extensions.

5. Breaking down Bill Belichick's draft-day trade-ups in the first three rounds.