On run plays, the coaches are looking for the Oline to keep their pad level low and drive the guy off the line of scrimmage. They are also looking for the Oline to maintain contact (engaged) with their guy until the whistle. If there is a stale mate at the line of scrimmage it is considered a defensive win. Too many times, Legursky and Urbik are being stood up at the line (failing to maintain low pad level), not getting any push downfield, and are not engaged with their guy until the whistle. If you have a dvr or TiVo watch the line play on running plays and you can usually figure out the good, the bad, and the ugly. I played oline in high school and don't claim to be an expert.