Both Jim Harbaugh and George Whitfield have been called “The Quarterback Whisperer” at various points in the last few years. That alone says a lot about Harbaugh adding Whitfield to his staff as an intern this spring and summer. That is, some football coaches can be – loud cough -- a wee bit territorial. They want another coach tinkering with one of their players as much as a master painter wants another artist adding a few bold flourishes to their latest piece.New 49ers intern George Whitfield worked with Johnny Manziel prior to the recent draft.