Alabama and Michigan are ranked first and second, respectively, in the AP Top 25, and that's not the only one-two punch the programs provide.

Through nearly two months of the 2016 college football campaign, the Crimson Tide and Wolverines have proved they boast the best defenses in the country.

Thanks to these elite units, both teams are leading contenders in the College Football Playoff chase. If either program eventually earns a berth to the four-team championship tournament—and perhaps the national title—defense will be the primary reason.
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