In the locker room after the Redskins 20-9 loss to the Dolphins, Brian Orakpo was at a loss for words. "It's frustrating. I'm running out of material. I dont know what else to say, he said.I know the feeling, Rak. Most of us who write about the Redskins are running out of material, too.The Redskins certainly were more entertaining on offense today, but they still are a deeply flawed offensive team, and that is the primary reason they have a five-game losing streak with no end in sight.The offensive woes start at quarterback. Mike Shanahan said after the game that he started Rex Grossman because he thought Grossman gave him the best chance to win. And that assessment may have been correct, as John Beck seemed to be regressing from game to game. We got Good Rex, as he seemed to get a rhythm with rookie receiver Leonard Hankerson (8 receptions, 106 yards). And we got Bad Rex, as he threw a bad interception on first down at the Dolphins' 10 with the Redskins trailing just 13-9 and looking at taking their first lead in a game since they beat the Rams on Oct. 2.That play was a dagger. It turned out to be a 14-point swing, as the Dolphins drove 81 yards in 10 plays for a touchdown. And while the defense did not play terribly, that was one of a few moments when it could have stepped up and given the team a boost but failed to do so.Another such moment came in the second quarter. The Redskins had just scored a field goal thanks to Kevin Barnes' interception that he returned to the 5 (more on that later). But the defense gave the three points right back on a 13-play, 82-yard drive.Still, they held the Dolphins to 303 yards and 20 points. Thats not shutdown defense, but it should keep an NFL team in a game. And they did set the offense up with the aforementioned interception return to the 5 and again later with Ryan Kerrigan's strip and sack. Stephen Bowens recovery gave the Redskins the ball at the Miami 24, but the subsequent drive fizzled and the Redskins again had to settle for three.The Redskins five-game losing streak has come mostly against competition that is mediocre at best. The 49ers are a quality team, but the Eagles, Dolphins and Panthers are a combined 7-20. The Bills are 5-4, but in two games since shutting out the Redskins have given up 71 points.The bottom line is that the Redskins defense is decent but not nearly good enough for the team to win without an offense that can put the ball in the end zone. And that means the losses are likely to keep piling up until the Redskins can find an offense.