Josh Adams said Wednesday he doesn't know what his role might be against the Colts on Sunday, when he is expected to make his NFL debut.

Adams, the Eagles' biggest running back at 6-foot-2, 225, said he is focusing on practice, after being elevated from the practice squad this week, in the wake of Jay Ajayi's back injury. Neither Ajayi nor running back/returner Darren Sproles (hamstring) practiced Wednesday.

"Both of them are day-to-day — Darren is a little bit longer. Jay is day-to-day," coach Doug Pederson said. "We'll see where he is at the end the week."

Adams, from Notre Dame and Central Bucks South, said, "We're going to take it day-by-day." He went undrafted after a foot fracture was discovered during the draft process, then suffered nagging injuries in the preseason that blunted his quest for a roster spot. Adams said he is healthy now. If Ajayi and Sproles don't play, the running backs Sunday would be Corey Clement, Wendell Smallwood, and Adams.

Offensive coordinator Mike Groh said this week that Adams "knows our system, and we think he's got an upside. He's a big body, and we're excited about seeing Josh."

Birdseed

Doug Pederson said left tackle Jason Peters will play Sunday. Peters, listed as a limited practice participant Wednesday, suffered a quadriceps injury last Thursday in practice and had to leave Sunday's game in Tampa after playing just eight snaps … Linebackers D.J. Alexander (knee) and Nate Gerry (groin) did not practice … Jordan Mathews will wear No. 80 in his second go-round with the Eagles, with Kamar Aiken possessing Matthews' former No. 81. Matthews said he likes 80 because his mother's cousin is Jerry Rice. When the Eagles drafted Matthews in 2014, Ifeyani Momah had No. 80, so Matthews took 81.