It helps when QBs know that the head coach really knows what he’s talking about when showing them things and Jim Zorn certainly does.  After all, he was a starting QB in the NFL for a few seasons so he knows first hand about what his QBs are going through on the field.  Young Jason Campbell has been excellent so far this pre-season as he has completed 12 of 15 passes (80%) for 132 yards with 1 TD pass and 0 interceptions (125.6 QB Rating).  Veteran Todd Collins has also been very solid completing 13 of 17 passes (76.5%) for 109 yards with 1 TD pass and 1 interception (87.6 QB Rating).  Rookie Colt Brennan has also looked really good so far this preseason completing 13 of 18 passes (72.2%) for 160 yards with 2 TD passes and 0 interceptions (136.3 QB Rating).  The most impressive thing about the Redskins’ offense so far this preseason has been the balance as they have averaged 155.5 yards rushing per game and 192.5 yards passing per game.