For his first 16 weeks in the NFL, Sam Ehlinger has had the same practice routine: When the Colts first-team offense is on the field, he's lined up somewhere behind Carson Wentz.
He takes the mental reps that Wentz does. He knows the play call and what the first read is, so from the hike to the drop back, everything is the same. But when it comes time to plant and throw, the sixth-round rookie from Texas takes the football that's in his hands and lets his mind and heart decide what's next.
The act is something beyond mimicry.