PHILADELPHIA ( - You would think that a contract extension would be enough to solidify Jason Peters' future.

And from the standpoint of his stay in Philadelphia, it is. The position he could be playing down the road, however, could be in doubt, at least if you believe coach Doug Pederson.

"It's hard to speculate, obviously, on that," Pederson said when asked if the 35-year-old Peters would finish his career at left tackle. "This year, that would be the scenario. That would be the case. In the future, that's something we would definitely cross that bridge ... if we needed to move him inside, for instance. But right now, he's left tackle and Lane [Johnson] is right."

Johnson played left tackle in college at Oklahoma and had been playing there throughout voluntary OTAs in Peters' absence. The former No. 4 overall selection was actually drafted as the heir apparent to Peters on the left side but that keeps getting pushed back as the veteran continues to produce.

At some point, Father time gets us all, however, and the thought has been that Peters' strength and run-blocking ability could be an asset inside at left guard perhaps.

Second-year player Isaac Seumalo is trying to hold off veteran Allen Barbre at LG this season but the Eagles believe the former's best position long-term is at center, meaning if current pivot Jason Kelce is gone by 2018, perhaps, Johnson, Peters, Seumalo, Brandon Brooks and Halapoulivaati Vaitai from left to right could be the end game a year from now.

"With his size, athleticism, strength, gosh, the way he comes off the ball. Would be a great asset really anywhere along that offensive line. But guard could be a potential spot somewhere down the road," Pederson admitted.

-John McMullen covers the Eagles and the NFL for You can reach him at or on Twitter @JFMcMullen