The 49ers have every reason to feel optimistic about the group of defensive backs they have assembled for training camp.
The 49ers also have reason to be concerned with a group of largely unproven players who have battled injuries. And one of the big question marks concerns their most experienced and decorated player who faces the biggest challenge of his career.
Who’s Here
CB Richard Sherman, CB Ahkello Witherspoon, SS Jaquiski Tartt, FS Adrian Colbert, NB K’Waun Williams, DB Jimmie Ward, DB Tarvarius Moore, DB D.J. Reed, S Marcell Harris, CB Greg Mabin, S Chanceller James, DB Tyvis Powell, CB Tarvarus McFadden, CB Emmanuel Moseley, CB C.