Off-season RB Index: Breaking down biggest questions in the backfield

Can any running back win the Heisman in 2015? Which team has the best group of backs? SI.com's Ben Glicksman and Colin Becht answer these questions and more.

Other than Melvin Gordon and Todd Gurley, most of college football’s top running backs return this fall. With so much standout talent in the backfield and plenty of on-the-rise rushers ready to make the leap into stardom, SI.com’s Ben Glicksman and Colin Becht discuss the following topics in the video above:

• Of the top returning running backs, which are you most excited to see play again? Who’s set to have the biggest season among Ohio State’s Ezekiel Elliott, LSU’s Leonard Fournette, Georgia’s Nick Chubb and Alabama’s Derrick Henry?

• Can a running back win the Heisman Trophy this year? With only one winner in the last 14 years, why has it become so hard for backs to take home college football’s most coveted individual award?

• Among running backs stepping into bigger roles this season, who’s poised to become a national star? Which players can spring off of a solid 2014 season to become a household name this year?

• Which team has the best group of running backs? The coaches may not be able to settle on one, but that doesn’t mean that the pair or trio of backs isn’t dominant.

MORE COLLEGE FOOTBALL:

• STAPLES: How Dan Beebe saved the Big 12 from extinction

• BECHT: What's next for Ga. Southern after Sun Belt title in 1st FBS season?

• ELLIS: Off-season Spotlight: Get to Wisconsin's next star RB Corey Clement