After a 63-24 rout of Illinois in its Big Ten opener, Penn State inched up one spot from No. 10 to No. 9 the latest Associated Press college football poll.

The Nittany Lions could make a jump after Saturday's game vs. Ohio State. The No. 4 Buckeyes are averaging the most points per game of any FBS team in the country with 55.5. Penn State is right behind them, in second with 54.5 points per game.

Happy Valley will play host to ESPN's College Gameday ahead of the primetime matchup taking place Saturday night at Beaver Stadium.

After a season-high seven ranked teams lost, the back half of the AP poll got a makeover on Sunday. Five teams entered the Top 25, including No. 17 Kentucky for the first time since 2007.

At the top it was mostly status quo, with Alabama, Georgia, Clemson and Ohio State staying Nos. 1-4. LSU moved up to No. 5, swapping places with Oklahoma after the Sooners needed overtime to get by Army.

Kentucky is unbeaten and 2-0 in the SEC for the first time since 1977. The last time the Wildcats were ranked was Nov. 11, 2007. Duke is ranked for the first time since October 2015, giving the football poll a basketball feel. The Wildcats and Blue Devils were last ranked at the same in September 1957.

No. 14 Michigan is back where it started the season, moving up five spots this week. Miami also jumped five places, but that movement had as much to do with the teams around the Wolverines and Hurricanes losing. The seven ranked teams that lost Saturday were positioned between No. 13 and No. 23 in the rankings.

The Atlantic Coast Conference has three ranked teams in the Top 25 for the third time in four regular-season polls. No. 3 Clemson has played mostly as advertised and No. 16 Miami is slowly creeping back up the rankings after a lopsided opening loss to LSU sent the Hurricanes tumbling out of the top 10.

Florida State lasted one week in the rankings and now Virginia Tech is out after maybe the most stunning result of the season so far. The Hokies lost 49-35 at previously winless Old Dominion. Boston College seemed to be emerging as a possible dark horse, but the Eagles also lasted only week. BC lost 30-13 at Purdue on Saturday after being No. 23 last week.

Unbeaten Duke moving in kept the ACC from becoming the first Power Five conference to have a week this season with only two ranked teams.

Two seasons removed from Clemson winning a national title, Louisville's Lamar Jackson winning the Heisman Trophy — with Clemson's Deshaun Watson as runner-up — and the ACC finishing with a 9-3 record in bowl games, the conference could use a team or two to separate from the mediocrity. North Carolina State (3-0) and Syracuse (4-0) are the only other unbeaten teams in the ACC, along with Clemson.