By RALPH D. RUSSO, AP College Football Writer MIAMI GARDENS, Florida (AP) — DeVonta Smith was uncoverable, Najee Harris unstoppable and Mac Jones impeccable. With a performance that was both surgical and explosive, No. 1 Alabama won the College Football Playoff national championship game 52-24 against No. 3 Ohio State on Monday night. The final game of a college football season in a pandemic, a season