The details of Dak Prescott’s injury are in, and they’re not for the faint of heart.

Per NFL Network’s Jane Slater, the Cowboys quarterback appears to have suffered a partial avulsion of his hamstring tendon, partially tearing it right off the bone. ESPN’s Todd Archer later said his source confirmed that diagnosis.

Head coach Mike McCarthy had already ruled Prescott out for Sunday’s home matchup with the Philadelphia Eagles, but- despite owner Jerry Jones hinting that a subsequent move to injured reserve was imminent- the Cowboys have not made any official determination about a timeline for his return.

According to Slater’s sources, the injury typically “takes more than a four-week recovery,” but Prescott is said to be seeking secondary opinions. The team is therefore allowing that process to play out further before placing Prescott on IR, which would automatically mean a four-game absence.

“In some cases,” Slater posted on X, “they let it scar over, repair and then strengthen.” But, she said on-air Wednesday evening, the injury could require surgery, depending on its severity.

Prescott told reporters he “felt something” on a scramble late in the third quarter of Sunday’s 27-21 loss to Atlanta. After the sack by Falcons linebacker Kaden Elliss, Prescott went back to the huddle and ran the next play.

Upon trying to step into a cross-field throw, however, he pulled up noticeably.

“I felt a pull, felt something I’ve never felt,” Prescott explained.

He lasted one more play to finish the offense’s drive and then did not return for the Cowboys’ next possession.

Backup Cooper Rush finished the Week 9 contest and has been tabbed as the starter this weekend, but third-string option Trey Lance may figure into the mix, too, even if only on a handful of gadget-type plays or run situations.