Email from former player-
inside source (Some scrub whose name was removed to protect identity), says Waters is the starter as of now. Waters comprehension of the playbook and his reads are light years ahead of Klein's. Also noted that Sams is a duel threat with a better arm, but not as diligent with his studies of the game, playbook, etc. (not surprised). Hopefully the competition for #1 will bring the best out of them both QB's.
Synder also has to know if he doesn't give Sam's PT, he's subject to leave.