Juszczyk averages 9.6 snaps per game at running back, 12 snaps per game at tight end, 3.9 snaps per game at outside receiver, 3.1 snaps per game at slot receiver and has even taken a pair of snaps at quarterback. Ingold is the only other fullback to take snaps at all of those spots, and Juszczyk runs 11.1 routes per game, three-plus more than any other fullback.
Juszczyk's value isn't just his down-to-down versatility, it's his utility within each down. On any given play, he might be lined up at fullback in an I-formation and end up as an outside receiver or vice versa.
This season, Juszczyk has been in motion on 41.6% of his snaps, the second-most among players who have played at least 100 offensive snaps. That's been a theme of his nearly seven seasons in San Francisco, as he's been in motion on 1,015 snaps, fourth-most of any NFL player in that span.