Chart: About the other guys, Jerome Felton and Toby Gerhart

Position: Running back

Age: 26

In college: All-America in 2009 at Stanford after leading NCAA in rushing yards (1,871) and TDs (28). Runner-up to Alabama's Mark Ingram in closest Heisman voting (28 points) in history.

Drafted: Second round (51st overall) by the Vikings in 2010.

In the NFL: Has played in 47 of 48 games, gaining 1,022 yards on 240 carries as Adrian Peterson's backup.

Contract: In the final year of a four-year, $3.75 million contract that will pay him $630,000 this season.

Did you know? Gerhart's brother, Garth, is a 301-pound nose tackle in camp with the Packers after being on Cleveland's practice squad last season.

Age: 27

In college: A star running back at Furman, Felton was an FCS All-America in 2007 and holds the school record for points (414).

Drafted: Fifth round (146th overall) by Detroit in 2008.

In the NFL: Played three seasons for the Lions, was with Carolina and Indianapolis in 2011 before signing a one-year deal with the Vikings.

Contract: Felton signed a three-year, $7.5 million contract this year, with $2.5 million guaranteed.