AP Top 25 Heat Check: Alabama becomes unanimous No. 1

Alabama running back Najee Harris (22) hurtles over Tennessee defensive back Nigel Warrior (18) as he runs toward the end zone during the second half of an NCAA college football game Saturday, Oct. 20, 2018, in Knoxville, Tenn. Alabama won 58-21. (Joy Kimbrough /The Daily Times via AP)

Clemson quarterback Trevor Lawrence calls a play during the first half of an NCAA college football game against North Carolina State, Saturday, Oct. 20, 2018, in Clemson, S.C. (AP Photo/Richard Shiro)