The Jalen Hurts blood clot just turned the Eagles' already shaky season upside down. Philadelphia announced on Thursday that its star quarterback will sit out Sunday's game against the Carolina Panthers because of a superficial blood clot in his calf, and the team has not said when he might come back.

How the Eagles say it unfolded

According to the team's own statement, Hurts took a cleat to the calf in the Week Four loss to the Los Angeles Rams on October fourth. Four days later he walked into the training room after practice and asked for treatment. He then practiced fully on Friday before the team flew to London.

After the flight and a walkthrough, the staff ran an ultrasound "out of an abundance of caution," and it showed a superficial clot. Doctors in London decided that activity and mobility were important and that he could safely play, so Hurts took every snap in the loss to the Jacksonville Jaguars, according to NBC Chicago.

Doctors had asked for a follow-up scan within seventy-two hours of the game and the return flight home. That second ultrasound came Wednesday night, and it "revealed movement in the small blood clot." Thursday morning the Eagles ruled him out while they "determine the appropriate course of treatment."

What a superficial clot actually is

The word superficial matters. As the Philadelphia Inquirer explains, these are clumps of blood in veins close to the skin, which is a different thing from deep vein thrombosis, the life-threatening kind buried deeper in the body. Vascular surgeon Andrea Lubitz of Temple Health, who is not treating Hurts, told the paper that an earlier injury like a cleat to the calf could plausibly contribute.

In simple cases, she said, the problem resolves within a few weeks with conservative care such as heat, elevating the legs, anti-inflammatory medicine and sometimes compression stockings. The danger is a clot that sits near the deep vein system, because it could migrate deeper and then travel to the lungs. Lubitz called that risk "relatively low" with a superficial clot.

She also pointed out the gap in what we know. "They are not giving us enough information to make a judgment," Lubitz said, and she noted that "movement" is not how clots are usually described. It could mean the clot changed location or that it grew.

Why the treatment path decides his timeline

This is where the football question gets real. If the clot is bigger or closer to the deep system, the general recommendation is a long course of blood thinners, and Lubitz said people on those drugs generally cannot play contact sports because the bleeding risk is so high. If the clot is far from the deep veins, care would focus on symptoms, with another ultrasound in about a week.

CBS Sports reports that NFL insider Ian Rapoport described Hurts as "out indefinitely" and said he cannot play until the situation is resolved. CBS also noted that the Eagles have not confirmed any blood thinner plan, and that every case needs monitoring. In plain terms, one missed game could easily become several.

The schedule does not offer much mercy. After Carolina, Philadelphia hosts the Dallas Cowboys, visits the Washington Commanders and then hosts the New York Giants before a bye week in Week Ten.

A rough year gets rougher

The Associated Press framed the news as the latest bad break in a rough season for the Eagles, the sort of blow that might have left them reeling in a normal year. Tanner McKee is expected to start in Hurts' place, according to USA Today, which also described the team as quickly devolving into a lost season.

Hurts, who is twenty-eight and a Super Bowl fifty-nine MVP, told reporters on Wednesday that his calf trouble had been "a very unique experience, to say the least." Fans will ask whether the Jalen Hurts blood clot should have kept him off the field in London. Whether the club was right to let him play in London will almost certainly be argued all week, though the team says its doctors judged it safe and that his health and safety are the top priority.

Blood clots are not new to the league. CBS pointed to Panthers right tackle Taylor Moton, who has not played this season after clots were found in his lungs and who is only now nearing a return. Hurts' case appears far milder, since nothing reported so far says the clot has reached his lungs.

What to watch next

With the Jalen Hurts blood clot still unexplained, keep an eye out for three things: a clear statement on the treatment plan, any word on whether blood thinners are involved, and the result of the next scan. Those details will tell you whether the Eagles are looking at a short break or a long absence. Until then, McKee is the name to know, and the questions about the Eagles' medical process are not going away.

For more on the sports and health stories shaping the week, browse our health coverage and keep checking back as the Eagles release more information.