Why Ray Brown over Kenyatta Jones???

[PSUskinsfan11]

I don't understand why Ray Brown has started the last 2 games at RT. I was hearing a rumor that during the week before the Giants game he missed a practice early in the week, but why wouldn't he have started last night??? He played a great game vs. the Bucs tough D-line and has earned praise for his ability to work hard and fill Jansen's shoes so why would we have Brown who seems much slower blocking the blindside of Brunell???