TEMPE, Ariz. - Kalen Ballage and Demario Richard form arguably the most formidable running back duo in the Pac-12.

The pair has rushed for more than 800 yards already this season and 11 rushing touchdowns.

Both Richard and Ballage are tough to bring down, and thrive making yards after contact.

This got us thinking, how can you slow these guys down?

We also wondered if any of us could tackle either Richard or Ballage.

To save money on hospital bills, we decided to enlist a physics professor to help us tackle this burning question.

In short, we have no chance.