An overhaul on Atlantic Coast Conference coaching staffs this offseason has left some teams struggling to adapt to to new systems. There are eight new offensive coordinators in the ACC this season — more than half of the league. Some ACC teams made changes to shore up offenses that were slipping; others had to replace coaches who left for better jobs. Clemson fired offensive coordinator Brandon Streeter after just one full season as the offensive play-caller and hired Garrett Riley away from Texas Christian, where he helped the Horned Frogs reach the national championship game. Coach Dabo Swinney didn't get the improvement he hoped for in a 28-7 loss to Duke that dropped the Tigers from No. 9 to No. 25 in The Associated Press Top 25.

The Week 1 result that seems really meaningful but turns out not to be is a time-honored tradition in college football. The gold standard of this category is the infamous "Texas is back" game in 2016 when the Longhorns beat Notre Dame in overtime. The teams finished a combined 9-15. No. 21 Duke and No. 22 Colorado rode big upsets in high-profile games this past weekend to spots in the first regular-season AP Top 25 of the season Tuesday. Reality Check wonders: Has Deion Sanders' Buffaloes peaked already?

Deion Sanders wants his players reading all about how good they are because the Colorado coach isn't one to keep his players grounded. He prefers them flying high. After beating heavily favored TCU last weekend, the Buffaloes moved into the AP Top 25 poll at No. 22. The unconventional Sanders is proving to be a master motivator. He's all about not running from publicity but remembering it. He has his team at the center of the college football universe, at least for now. The 22nd-ranked Buffs will host old rival Nebraska this Saturday in the home debut for Sanders.

The Big Ten's westward expansion could challenge the league's reputation for smashmouth football. No Power Five conference relies more on defense and the running game than the Big Ten. The arrival of Southern California, UCLA, Oregon and Washington next year with their high-powered offenses just might change that. Six Big Ten schools ranked among the nation's top 14 teams in total defense last year. No Big Ten team other than Ohio State has finished in the top 20 in total offense each of the last five seasons.

There are some heavyweight showdowns for Big 12 schools in Week 2 of the college football season. Texas-Alabama tops the list, but Iowa plays Iowa State, Utah faces Baylor, Cincinnati takes on Pittsburgh, Kansas plays Illinois, Texas Tech plays Oregon and Oklahoma faces Arizona State. If the Big 12 wants to a big player after college football realignment, now is the time to prove it, especially after the league was embarrassed a week ago. Among the lumps the league took, TCU lost at home to Colorado, Texas Tech fell to Wyoming and Baylor was beaten by Texas State.