Eagles general manager Tom Heckert admitted on Tuesday that the team doesn't know who will start at left tackle this fall. However, he also said that they'll likely know by the end of next weekend's NFL Draft. "There are going to be some guys that play, that for one reason or another didn't get drafted high, but the top three guys you're hoping can play, because they're going to go early," Heckert said, perhaps inferring that Philadelphia will take a tackle and start him immediately. The Eagles have the 21st and 28th picks in the draft, and there are a number of first-round quality tackles in the field.