In all fairness, Youker picks twice before you, so you should hope he doesn't pick him (Dunn). Also, you don't need to tell anyone where you're positioning your picks. There is a midseason draft clubhouse (in the contest/prizes section) where you post that information. You can put anybody in any position that you want, however, it will effect the defense aspect of your team, which will influence your team's rating. For example, putting a player out of position will hurt the defense, unless it's something like moving a CF to LF/RF, or moving a SS/2B to 1B/3B.
Edit: Now Youker is officially on the clock (twice)