The rookie head coach, though, stumbled with some game management problems in a Week 2 home loss to San Diego, failing to utilize the clock to his advantage late in the game and also admitting he didn't understand calling a timeout could have enabled him to keep QB Michael Vick on the field for a key play after the veteran was dinged up.With the Eagles trailing by a field goal and just over two minutes remaining Vick, who threw for a careerhigh 428 yards in the game, was slammed violently to the turf by Chargers defensive lineman Jarius Wynn.The hit came inside the San Diego 20 and forced Vick to leave for one play, a 2ndand10 try from the 14 with 2:09 left."The referee said I had to come off," he said. "I was back up and standing, ready to play (but) the referee told me to come out."Backup Nick Foles came on and lofted a fade pass into the arms of DeSean Jackson, a nice outcome except it came three yards outside the field of play. No doubt groggy and behind the