Raiders make official 13 undrafted rookie signings

The Oakland Raiders were one of the last teams to announce their 2012 undrafted rookie class. They did so on Thursday evening, confirming the addition of 13 UDFAs. They are as follows: Utah cornerback Conroy Black, Nevada linebacker Kaelin Burnett, Beloit receiver/tight end Derek Carrier, USC receiver Brandon Carswell, Missouri defensive tackle Dominique Hamilton, Wisconsin…