Mike McCarthy said this was easily the most physcially demanding week of camp and after a 45 minute walkthrough today on Ray Nitschke Field, he had the players break into their position groups, turn and face the fans in the bleachers east of the field.  The guys then pulled out giant sling shots and proceeded to launch rolled up T-shirts into the crowd.  I have to say, the defensive linemen had a little trouble getting the shirts airborne and eventually, they just jogged over to the railing and tossed them up.  Once the shirts were gone, large gatorade tubs were opened to find hundreds of water balloons and the fight was on!  Players chased each other around the field, ganging up on the unfortunate souls and letting them have it.  Some were tossed into the crowd to cool them off but McCarthy and GM Ted Thompson were off limits.  A lot of laughs as McCarthy said it was sort of a team building opportunity and a way to say thanks to the fans at the same time.

McCarthy has ruled out five players for the Arizona Cardinals game and the list may grow after Friday's evaluation.  Already scratched are Brandon Underwood, Lawrence Guy, Anthony Levine, Adrian Battles and Chris Campbell.  More concerning is the fact Clay Matthews didn't even take part in Thursday's walkthrough after he said his hamstring tightened up Wednesday night and into Thursday morning.  Matthews has had hamstring trouble in camp in each of his first two seasons, not even playing a pre-season game a year ago.  They will err on the side of caution I'm sure.  McCarthy also admitted Mike Neal indeed had an MRI on his knee but it found no damage and he continues to be day to day.  T.J. Lang will get the start at left guard against the Cardinals.  Derek Sherrod opened last week in Cleveland and Lang gets his shot to run with the ones Friday night.