Jonathan Cooper, who never worked out and was traded to the Patriots last month.

There have been programs that prep offensive linemen a little more closely to what the Cardinals are trying to accomplish: Stanford, Iowa, Alabama before Lane Kiffin arrived as offensive coordinator. Most places, however, have moved away from the offense the Cardinals seek to run.

Goodwin said he spends a day every offseason in meetings when the rookie linemen show up simply teaching them the different defensive looks – the 3-4, 4-3, nickel packages and the like.

"When I was in college, I didn't have a complete grasp of what our offense was totally trying to do," Humphries said. "I just knew what the offensive line was trying to do. When you are in the NFL, you have to really understand what the whole offense is trying to do to really understand how the plays go."

Taking the starting-from-scratch thought further, there is also the opportunity to transform college defensive linemen into NFL offensive linemen, since there is so much to teach in the first place.

Tackles aren't the only ones impacted, Goodwin said. It goes across the line, including at center – the position the Cardinals are expected to address in this week's draft. The center is so crucial in what the Cardinals do offensively, Goodwin said either he or assistant line coach Larry Zierlein visited every single possible draftee at the position.

Some offensive linemen have to play right away, but Goodwin notes many do not play very well early on.