The two-running-back system is one of those "trends" we're seeing in the NFL. You have one guy that can pound third-and-one situations and another that adds versatility. But the logic is, if you alternate backs, you can get better production from the rested backs. Just ask Tiki Barber who believes Tom Coughlin ran him into the ground.
Len Pasquarelli believes that the two-back system may provide dividends to backup running backs when free agency starts two weeks from Friday.
So it won't be surprising if the Bengals are among the teams interested in acquiring a modestly priced veteran tailback in free agency.