I've wondered about this for some time, most gifted players do not live in one position from junior high to the NFL but are moved to where a team needs them in college, so it makes sense that they could do the same switch at the pro level. Most teams seem infatuated with a finished polished product that starts right away to save coaches butts but in a case like Seattle, a player has to be really darn good to unseat a starter. We can afford to take a guy and develop him behind a front line starter.
I also think that is why Pete really digs former QB's, usually the best athlete's in a lower college system are the QB's. That's why I was hoping we ended up with Dennard Robinson as a gadget player at HB/Slot WR/ with passing skills and top line speed.