Top college football matchups include Ohio State at Iowa this weekend

Week 5 of college football features several marquee matchups, including No. 5 Ohio State visiting No. 14 Iowa. Iowa recently achieved a last-second victory over Michigan, prompting ESPN's "College GameDay" to cover the game for the first time in two decades. Ohio State boasts a powerful offense averaging 45 points per game, while Iowa's defense is the nation's best, allowing just eight points per game. Other notable games include No. 7 Alabama against No. 16 Mississippi State and No. 8 Florida at No. 25 Missouri, both drawing significant attention as teams vie for playoff positioning.

• 1:27 PMYahoo Sports — Week 5 college football viewer's guide: Ohio State's trip to Iowa headlines the first weekend of October