There's no denying LSU has one of the best running backs in college football.

Sophomore Leonard Fournette is an absolutely dynamic ball carrier -- we all saw last season's Music City Bowl -- and what's keeping him from making a run at the Heisman Trophy in 2015?

Stopping him will be a daunting proposition for every opponent on the schedule, but the Tigers at No. 13 in the preseason coaches poll? Hold on just a second ...

Count Stewart Mandel and Sports Illustrated's Pete Thamel among the skeptics, and in the podcast clip above you'll hear why.

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FULL PODCAST: Is Notre Dame College Football Playoff material?