Bills bring in Trent Richardson for workout, but sign ex-Colts RB Herron instead

Trent Richardson was cut by the Raiders before the season started.

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Will former Alabama star running back Trent Richardson ever find an NFL taker?

After FOX Sports NFL Insiders Mike Garafolo and Peter Schrager reported that the Bills planned to work out free-agent running backs Trent Richardson and Daniel Herron, the team later announced Tuesday they signed the ex-Jets RB Herron. Terms of the deal were not revealed.

The Buffalo Bills’ depth at running back could be further depleted after tests revealed Williams sustained a concussion against the Giants.

Herron spent the past two season with the Indianapolis Colts, playing in 25 career games (three starts) and rushing 87 times for 389 yards and a touchdown. The 26-year-old running back was a sixth-round pick by the Cincinnati Bengals in the 2012 NFL Draft.

General manager Doug Whaley disclosed Williams’ injury Tuesday during his radio show on Buffalo’s WGR-AM. Whaley says tests showed the concussion on Monday, a day after Williams complained about not feeling well following a 24-10 loss to the New York Giants.

Williams is following the NFL’s concussion protocol, and must pass a series of tests before being cleared to play. Buffalo (2-2) plays at Tennessee (1-2) on Sunday.

Williams was hurt after making his first start filling in for LeSean McCoy, who is out indefinitely because of a hamstring injury.

The Bills have only two other healthy tailbacks on their roster, Boobie Dixon and Cierre Wood, plus fullback Jerome Felton.

Richardson’s stock has dropped since being selected by Cleveland with the third pick in the 2012 NFL Draft. After a solid rookie season, Richardson was traded to Indianapolis a few weeks into the 2013 season.

Richardson eventually lost his starting job with the Colts and has yet to find a job since being waived in March.

Smith has five seasons of NFL experience and spent last year in San Francisco, where he played under Bills new offensive coordinator Greg Roman.

Whaley also didn’t rule out the possibility of re-signing Bryce Brown, who was released on Sept. 15.

-The Associated Press contributed to this report.