Justin Fields was with the Chicago Bears when the Pittsburgh Steelers hired Arthur Smith as offensive coordinator. Smith certainly had no idea that he would be building his new offense, in part, with his skillset in mind. Of course, the Steelers have Russell Wilson as their starter, but Fields is the backup, and could play in sub-packages.
Smith is the type of football mind who strives to build around what he has, like a thrifty chef. So since the Steelers traded for Justin Fields, he has been reviewing their options about what they can do with him. He talked pretty extensively about the young quarterback on Thursday during practice.