What exactly are the Giants doing with their running backs?

EAST RUTHERFORD, N.J. -- Confounding fans and fantasy football players alike, the New York Giants' running back rotation remains a weekly mystery. Even to the team's coaching staff.

"Obviously, we're trying to find a guy that's going to get in a rhythm and kind of take off with it," running backs coach Craig Johnson said Monday. "But so far, no one has."

The Giants rank 26th in the NFL in rush yards per game with 95 and 28th in yards per rush at 3.8. No Giants running back has run for more than 63 yards in a game this season. (Oddly, that 63 by Rashad Jennings came in their one blowout loss, Week 6 in Philadelphia.) Jennings has been the team's leading rusher in eight of its 10 games, but his…