Altherr is still a work in progress, really didn't show a lot until 2015 when he improved his plate discipline, one of those "athlete" types they used to draft, but in the right round.
Last year was lost, but it looks like Stairs has him back on track.
Still struggles picking up breaking balls, if he learns to stay off them out of the zone he'll become a tough out.
In the field, he's exceptional, speed, really good instincts, top flight arm, can play all three OF spots at a high level.
Thing is, as a .750 OPS OF with his defense, he's an above average starter, if he improves his plate discipline, with a higher OBP and his power, he's a good bet for .800+.