I don't think Klieman is 6'. If I had to guess I'd give him 5'10" tops. He was a DB at UNI if I recall correctly.
Only one way to settle this... all the coaches have to go through pro day measurements and drills. I'd honestly be interested to see what kind of numbers Roehl would put up... the guy is still built like a Mack truck!
EDIT: Here's a pic of last year's staff: http://www.bisonillustrated.com/wp-c...7-1200x700.jpg. Klieman doesn't look any taller than Roehl and he was listed at 5'10" when he played.