I assumed they didnt want the focus to be on Willie's shepard or if Sheed played on that 7's commentary had.I actually think a big reason is Frawley's reaction to Ryan's mark.
Both were fair calls in my books (Willie was grappling for the mark, and Sheed only took a step because of momentum of running back) - but we all know some Eagles haters and pies fanatics don't see it that way - so was smart to use audio that didn't focus on either.