(973espn.com) - An initial diagnosis has revealed that Eagles All-Pro right tackle Lane Johnson suffered a Grade II MCL sprain during the Eagles win over Jacksonville at Wembley Stadium on Sunday.

That type of injury could cost Johnson up to a month but will not be a season-ending proposition, which is obviously good news for Philadelphia.

Johnson suffered the injury during the Eagles' second possession of the game and was carted off the field to the locker room being replaced by Halapoulivaati Vaitai.

At one point left tackle Jason Peters also was forced to leave with a potential concussion and Vaitai moved over to replace him with Isaac Seumalo kicking out from left guard to right tackle and Stefen Wisniewski coming in at left guard.

Wiz also was forced to take one rep at center on the second offensive play of the game after Jason Kelce was cleated in what the All-Pro center called the "crown jewels."

Ultimately Peters was cleared and able to return so Vaitai spent most of the game at right tackle.

In addition to Johnson and Peters, linebacker Kamu Grugier-Hill also left the game in the first quarter with a thumb injury.

Cornerback Jalen Mills, meanwhile, left after being carted off with a foot injury in the third quarter. Rasul Douglas came in when Mills went down with Ronald Darby moving to left corner, Mills' typical spot, and Douglas taking over RC duties, Darby's usual job description.

-John McMullen covers the Eagles and the NFL for 973espn.com. You can reach him at jmcmullen44@gmail.com or on Twitter @JFMcMullen