For months now, former Oregon quarterback Marcus Mariota has been working on what many inside the sport say is a massive change to his game. After winning the Heisman Trophy while piloting Oregon’s famous no-huddle, quick-strike offense that left college defenses gasping for air, Mariota is learning to huddle.

“That seems like a little detail but that is kind of a big thing,” Mariota said during the NFL draft process.

He has been given a mock play-call sheet and is calling plays in training in an effort to placate NFL teams who want to see him operate a more traditional offense.

This is one of many tweaks that college players are asked to make, but it can be a very bad thing. No one is telling Martin Scorsese to direct an episode of “The Big Bang Theory,” and no one should ask Mariota to huddle.

The NFL is one of the few industries that finds perfect candidates for their jobs and then makes them change everything. Mariota will be drafted high on Thursday night—possibly as high as the second overall selection. Then comes the hard part: making him an “NFL” quarterback. That means huddling, taking a snap directly from the center and running less with the football. None of those are Mariota’s strengths.