Tackle Jason Peters exited Thursday night's win over the Giants after suffering what the team called a biceps injury. Head coach Doug Pederson said on Friday that tests were still being conducted, but the outlook was optimistic.

"Early indication, I think, again, I don't want to speculate too much, but it's positive, and we'll see," he said. "Kind of a day-to-day (situation), and I've just got to wait and make sure that all the information is accurate."

Offensive line coach/run game coordinator Jeff Stoutland was asked on Monday about a contingency plan if Peters is unable to play. Halapoulivaati Vaitai will be ready if called upon to start at left tackle, but Stoutland isn't sure if that will be needed.

"I don't think he's going to miss any time, personally," Stoutland said of Peters.

"That guy is a warrior. You know how he is. He keeps playing and playing and playing," he added.

Stoutland offered an evaluation of Peters' performance this season. Peters opened the year without any playing time in the preseason as he recovered from an ACL injury suffered in Week 7 of 2017.

"He seems like he's always playing against the best player on the field. (Giants edge rusher) Olivier Vernon is a premium pass rusher. That guy's a great player," Stoutland said. "I think he's still extremely productive and playing at a very high level."

The Eagles have had to deal with change along the offensive line for both health and performance reasons early this year. Even with the uncertainty regarding Peters, Stoutland is confident that the line will round into form as the Eagles push toward the postseason.

"It's not over, yet. We've got a long ways to go. You could have said the same thing to me at this time last year," Stoutland said. "I think we're getting better each week, to be honest with you."