Maybe it's because of the quarterback change. Maybe it's because of injuries on the offensive line. Maybe it's the backs.
Maybe it's everything.
For whatever reason, the Eagles' running game is not what it once was.
"Definitely not where we want it to be," Jason Kelce said.
It's easy to point to exactly when the problems began. After the Bears game, which was the Eagles' ninth straight win.
The first 11 games of the season, the Eagles were second to only the Jaguars in rushing yards per game (148) and behind the Saints in yards per carry (4.7).
The last five games, they were 27th in rushing yards (99) and 23rd in yards per carry (4.0).
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That's a huge drop-off.
"It's not far off," Lane Johnson said. "Really just comes down to us executing the way that we did before. It really boils down to us up front.
"Ultimately, we need to get our guys rested up and I think we did that the past few weeks and we need these physical practices to get back to what we do."
A big part of the problem is that the Eagles haven't been hitting any big plays in the running game. Nate Sudfeld's 22-yard scramble Sunday on his first (and only) career run equals the Eagles' longest running play the last five weeks.
The Eagles had 17 runs of 20 yards or more the first 11 weeks. Just two the last five weeks.
"I don't think we ever got away from it, I just think our execution in the run game has been poor," Doug Pederson said.
"We just have to get back to fine-tuning and showing our guys every look potentially front-wise and making sure we as coaches have everything covered, and that it's just a conscious effort to stay dedicated to the run game.
"That run game, we've got to get back to the way we did it a couple weeks ago."
Pederson has said that Jay Ajayi, who didn't play Sunday against Dallas, will likely become more of a featured back in the postseason, and maybe that will help.
It's tough to win in the playoffs without a running game.
In franchise history, the Eagles are 14-4 in the postseason when they rush for 100 yards and 5-17 when they don't.
"There've been situations we needed to pass the ball, and we tried to do a couple runs and they weren't successful so we started throwing the ball more," Brandon Brooks said.
"We just need to get back to basics, get back to what we have done well throughout this year. Other than a game or two, it really hasn't gone anywhere."
Pederson said teams aren't defending the Eagles any differently since Nick Foles replaced Carson Wentz, but the running game's struggles have been at their peak in Foles' three starts.
"I think it's a combination," Kelce said. "We certainly need to block better. We need to handle some things we've seen in the games a little bit different. We've just got to do a better job adjusting in games to what the defense is giving us."
It's unusual to see the Eagles unable to run the football with authority at home.
The last two games are only the third instance of the Eagles rushing for fewer than 80 yards in consecutive home games in the last 25 years.
"It's a Catch 22," Kelce said. "You never want to struggle. Especially when the postseason starts, you don't want to be struggling, but I think it's actually good for us to see so we can figure out what we need to work on and what we need to do better."