Take this for what it is, which seems just to be a guess on the part of Domowich buried at the end of his interesting column about Kevin Curtis, but there's some logic to it.
I would recommend checking out the article either way. It has the thoughts of a few Eagles players and outside personell guys on Curtis and talks about the stereotypes he faces based on his race.
Update [2008-1-4 12:23:40 by BleedGreen]: Funny enough, as I was writing this Andrew posted a good diary on the Curtis portion of the article and even expands on it. Check it out.