I like this description, specifically the areas I have highlighted which I think we need big time:
If he hadn't become a wide receiver, it's entirely possible that Allen could be a coveted safety in this draft. His experience on defense shows up on offense, where he has a great knack for finding space in coverage, working back to the ball to help his quarterback and using great hands as a dependable pass-catcher. He's dangerous with the ball in his hands. Allen has dealt with nagging injuries during his time at Cal, but is the kind of wideout who can come in and make his mark early, and Houston needs to find another weapon for Matt Schaub, with Andre Johnson on the backside of his career.
(ESPN Insider content)