PHILADELPHIA -- The Eagles practiced without Nelson Agholor, Lane Johnson and Derek Barnett on Thursday.

Agholor (knee), who is now the Eagles’ top receiver, was held out of the media portion of workouts to begin the week. The Eagles placed fellow starting wide receiver Alshon Jeffery (foot) on injured reserve prior to the practice session, so the depth chart is pretty limited at this point in the season.

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The Eagles promoted practice squad wide receiver Robert Davis to the 53-man roster in a corresponding move to Jeffery being placed on injured reserve. Davis, a 6-foot-3, 210-pound playmaker, is intriguing due to his size-speed combination. He’s been on the Eagles’ practice squad since October.

With Agholor still sidelined, Davis is one of three healthy wide receivers on the Eagles’ depth chart. Greg Ward and J.J. Arcega-Whiteside shined against the Giants on Monday, but the limited numbers at wide receiver put the offense at a disadvantage throughout most of the Week 14 win. The Eagles are likely to promote Marken Michel from the practice squad if Agholor is unable to play against the Washington Redskins in Week 15.

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Along with Agholor, Johnson (ankle) and Barnett (ankle) were both sidelined. Johnson suffered an ankle injury during the Week 14 win over the Giants, while Barnett missed that game with his own ankle ailment. If both players can’t play on Sunday, Johnson will be replaced by Halapoulivaati Vaitai and Barnett will be replaced by Vinny Curry.

In positive news, linebacker Kamu Grugier-Hill (concussion), cornerback Jalen Mills (elbow) and running back Jordan Howard (shoulder) all practiced on Thursday. Grugier-Hill and Howard both need to be cleared for contact before becoming full participants in practice.

Grugier-Hill missed practice all of last week. He also missed the Week 14 win over the Giants. His return to practice is a good sign of his progress in the league’s concussion protocol.

UPDATE: Here’s the official Eagles injury report for Thursday:

DNP: WR Nelson Agholor (knee), DE Derek Barnett (ankle), OT Lane Johnson (ankle)

LIMITED: CB Jalen Mills (elbow), RB Jordan Howard (shoulder)

FULL: LB Kamu Grugier-Hill (concussion)

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Mike Kaye may be reached at mkaye@njadvancemedia.com. Follow him on Twitter at @Mike_E_Kaye. Find NJ.com on Facebook.