PHILADELPHIA (AP) One week into the preseason and it��s still unknown how the Philadelphia Eagles will use their running backs.

Will it be a rotation or will a lead back still emerge?

��I think we��ve still got to work through that,�� offensive coordinator Frank Reich said.Connor Barwin Jersey

Ryan Mathews led the team with 661 yards rushing and 8 touchdowns in 2016, but he suffered a neck injury late in the season and was released Tuesday after receiving clearance to return to football.

The Eagles signed veteran bruiser LeGarrette Blount to a one-year contract after he ran for a career-best 1,161 yards and led the NFL with 18 rushing TDs last season in New England.Jordan Matthews Jersey

Second-year pro Wendell Smallwood showed flashes during as a rookie, running for 312 yards in 13 games.

Rookie Donnel Pumphrey, an undersized fourth-round pick,Carson Wentz Jersey had a fumble on one of his carries and muffed a punt in the preseason opener against Green Bay.

Undrafted rookie Corey Clement, who ran for 1,375 yards and 15 TDs for Wisconsin last year, had 13 yards on seven carries last week.

Then there��s versatile scat back Darren Sproles, who had a career-high 94 carries last year at age 33. Second-year pro Byron Marshall also is competing for a roster spot.Fletcher Cox Jersey

��I feel good about our running game,�� Reich said. ��We didn��t run it very well against Green Bay, but I��m very confident that we will run the ball well this year.��

The Eagles host the Buffalo Bills on Thursday night.