Rodney Harrison was a significant presence in the middle of the field for 14 years with the San Diego Chargers and New England Patriots.  Said by many to be the hardest hitting safety since Ronnie Lott, Harrison was voted to 2 Pro Bowls while with San Diego and was a defensive captain during his tenure with New England.  Harrison is the all-time leader in sacks by a defensive back, totaling 30.5 over the course of his career.  Currently, Harrison is a football analyst for NBC Sports.