"It's not good," one team official said. "It doesn't look good at all. We're still waiting for (more test results), but it looks bad."
Eagles coach Andy Reid said after Monday's game that Herremans suffered a tendon strain in his foot-ankle area. Reid said Herremans underwent an MRI and saw a foot specialist on Tuesday morning. He is scheduled to have a CT scan on Wednesday morning.
If Herremans is done, the Eagles' offensive-line situation goes from bad to worse. The team is already playing without All-Pro left tackle Jason Peters and center Jason Kelce, who are both out for the season. Right guard Danny Watkins has missed the past two games with what Reid has called a chronic ankle issue.
It's a minor miracle Michael Vick has lasted this long considering the number of wicked hits he's taken on a weekly basis. The situation won't improve if Herremans exits the picture.
Follow Dan Hanzus on Twitter @danhanzus.