It was a weekend of upsets across college football, including two in the Big Ten (although UW was the favorite, so would that qualify as an upset?). Those and the other games definitely caused some changes in the rankings this week.
Polls
There are now 6 Big Ten teams ranked in both the Coaches Poll and in the AP Poll. USC dropped out of the top-25 after their loss to Minnesota. Michigan stayed in the top-25 despite their loss, although they dropped considerably. Because of Alabama’s loss, there are now 3 Big Ten teams in the top 4 in the AP poll (and 3 in the top 5 in the Coaches poll).