"Alfonso Smith knows the familiar names of the free-agent running backs still looking for NFL work. Clinton Portis. Correll Buckhalter. Laurence Maroney.

Beanie Wells may not have as much to lose as Smith, but he knows they're out there, too. LenDale White. Tiki Barber. Kevin Smith.

The Cardinals will be adding one of those players - or someone like them - in due course after losing rookie Ryan Williams to a season-ending leg injury Friday night against the Green Bay Packers.

Head coach Ken Whisenhunt reiterated on Monday there is no immediate rush to sign a new running back, but whoever it is, he will likely be asked to complement Wells, the starter, and prove he is better than Smith, who has moved up the depth chart.

So what type of back are the Cardinals eyeing?

"One that can do a little bit of everything," Whisenhunt said. "Obviously, someone that can help on third down, but be a good first- or second-down back. But it's not something we're just going to do overnight."