In the NFL today, the Philadelphia Eagles have arguably the best offensive line in the League. Some feel in order to build a top offensive line, it has to be done with first-round draft picks. The Eagles are a perfect example of why that isn't necessarily true.
All five of the Eagles' offensive line starters were originally drafted and developed by the Eagles. Developing offensive linemen starts with a good OLine coach, and the Eagles have one of the best in the business in Jeff Stoutland. Stoutland is so highly thought of by the Eagles front office that he has stayed with the Eagles even though they have had three different Head Coaches during his time in Philly.