NFL Network Insider Ian Rapoport reported Monday that Johnson suffered an abdominal injury during Saturday's loss in Dallas that will knock him out of the final two games of the regular season, per sources informed of the situation. Whether Johnson can return for postseason play remains to be seen.
In other Eagles injury news, cornerback Avonte Maddox suffered a significant toe injury against the Cowboys and will be out indefinitely, per Rapoport and NFL Network Insider Mike Garafolo. Cornerback C.J. Gardner-Johnson, however, is eligible to come off injured reserve this week as an option to replace Maddox in the slot.
Eagles head coach Nick Sirianni confirmed later Monday that Johnson and Maddox will miss some time.
"Still evaluating through everything," Sirianni said, per NBC Sports Philadelphia. "Probably think they'll miss a little bit of time, but we'll never put a timetable on anyone. It's early in the process and we want to get some information back."
Johnson went down in a lot of pain with just under five minutes remaining in the fourth quarter on Saturday.
The NFL's steadiest right tackle, Johnson had started every game this season after missing at least four tilts in each of the previous three seasons.
Philly hopes Johnson will return for the postseason run. If the Eagles secure a first-round bye, they won't play until the Divisional Round, which kicks off on Jan. 21 -- just under four weeks away.
The Eagles (13-2) host the New Orleans Saints in Week 17 before closing at home against the New York Giants. Philadelphia will clinch homefield if it wins either game.