If you want, you can adjust player rankings before the draft starts. For example, if you think Sidney Crosby is a hoser and you don't want him on your team, you can put him on your "Do Not Draft" list. Or if you think Gustav Nyquist is going to have a stellar year, put him on your "Preferred Players" list.
From the menu, click "Draft Central" then "Pre-Draft Rankings." When the page loads, click "Edit My Pre-Draft Player Rankings."