The injury bug is biting more players for the Redskins during training camp.  First, safety LaRon Landy tweaked a hamstring.  Then, defensive end Chris Wilson strained a calf.  After that, top draft pick Devin Thomas pulled his right hamstring.  The wideout could be sidelined for a couple of weeks.  It’s unclear how quickly the rookie will heal.  Center Casey Rabach is being counted upon by new coach Jim Zorn to anchor the offensive line.  Quarterback Jason Campbell was laughing about getting peppered with pads as he dropped back.  The pads simulate opposing defenders.