Reagor could return for the second half of the season or earlier, Rapoport adds.
The receiver suffered the injury during his team's Week 2 matchup against the Los Angeles Rams and attempted to play through it. The ailment is similar in nature to the one that kept New Orleans Saints quarterback Drew Brees out of action for five games last season.
Philadelphia drafted Reagor in the first round of this year's draft, and he was thrown right into the mix to start the season. The rookie receiver caught a 55-yard pass in his Week 1 debut and followed that up with 41 receiving yards in Week 2.
Wentz will now have to count on a receiving group that still features the likes of DeSean Jackson, Greg Ward, and John Hightower. The Eagles could also continue to use a dual tight end formation with Zach Ertz and Dallas Goedert.