Which programs have the best defensive backs for 2018?

Lavert Hill and the Michigan Wolverines secondary will be tough to beat in 2018. Mark LoMoglio/Icon Sportswire

Which college football programs have the top defensive back groups for 2018? Here are the top 15 defensive back units in college football.

Editor's note: This article was adapted from Phil Steele's college football preview magazine, which is available here.

1. Michigan Wolverines