PHILADELPHIA — It’s been a complicated season at left guard for the Eagles.

Stefen Wisniewski opened the season as the starter, as he had for most of last season, before ultimately losing his job to Isaac Seumalo after four games, and Wisniewski wasn’t exactly happy about his demotion. Well, he’s about to be demoted again.

Seumalo missed the last three weeks of the season with a pectoral injury, but returned to practice this week and the Eagles intend to insert him back into the starting lineup against the Chicago Bears in a NFC wild-card matchup on Sunday, a person familiar with the situation told NJ Advance Media.

Seumalo will need to make it through practice this week without any hiccups, but the intent is for him to start on Sunday at Soldier Field.

Seumalo worked with the starting offensive line group during individual drills at the portion of practice open to the media on Thursday.

Eagles coach Doug Pederson wasn’t ready to address the left guard situation when asked about Seumalo at his Wednesday conference in NovaCare Complex.

“We have to see where he’s at, No. 1, before we make any other changes at that spot,” Pederson said.

Wisniewski had improved his play in Seumalo’s absence, not allowing a sack on 126 pass-blocking snaps, per Pro Football Focus. Ultimately, the Eagles still prefer Seumalo as a starter at the position.

In nine starts this season, Seumalo only allowed one sack in 341 pass blocking snaps.

The Eagles have a tall task ahead of them on Sunday, as the Bears feature one of the best pass-rushing defenses in the NFL, led by Defensive Player of the Year candidate Khalil Mack, who finished with 12.5 sacks after being acquired from the Oakland Raiders. The Bears rank tied for third place in the league with 50 total sacks.

As for Wisniewski, it’s unclear what this means about his future with the Eagles.

He’s under contract for next season but he expressed his displeasure with being benched earlier this season through the media and might not be happy to be relegated to reserve duty in 2019. The Eagles can release him this offseason and save $3 million, only incurring a $708,334 dead cap penalty.

In the meantime, Wisniewski will serve as the primary backup to both Seumalo and right guard Brandon Brooks, as well as center Jason Kelce.

Zack Rosenblatt may be reached at zrosenblatt@njadvancemedia.com. Follow him on Twitter @ZackBlatt. Find NJ.com on Facebook.