i didnt need to. look at his stats. all of his 100 yard games he had a run of at least 21 yards(a few were over 40). in ten of the games this year he had an YPC of 3.7 or less, all of which he didnt have a run of 25 yards or more.
http://www.nfl.com/players/playerpage/494527/gamelogs/2005
my point about parker is you will never have a consisent running game with him. he's a great change of pace back, and is good for a big gain or two a game, but he wont be someone you can give the ball to 25 times a game. sounds exactly like chris brown.