up near the top left corner of the league home page, next to the draft info, there's a box that has some text in it. One of the things says "pre-rank players."
i've never preranked before, but it should be self explanatory on how to do it.
2014 Indianapolis Colts: Let's Hunt
"[He's] a really complete player... There's not really any weaknesses to his game." - Bill Belichick on Andrew Luck
"Luck has the most diverse skill set of any NFL quarterback" - Ron Jaworski on Andrew Luck being a top 5 QB