rotoworld,
Updating a previous item, the Eagles are reportedly "fearing the worst" on the ankle injury sustained by FS Marlin Jackson in Tuesday's practice.
"It's not good," one source said. Jackson was shedding tears and punching the practice bubble walls shortly after the injury occurred. The Eagles will update his status later this week, but early indications suggest it's serious enough that he'll miss time during the season. His two-year, $6 million contract is not guaranteed for injury. Rookie Nate Allen moved up to the first team for the remainder of Tuesday's practice.
Source: Jason LaCanfora on Twitter