Philadelphia Eagles defensive back Marlin Jackson, who is coming off ACL surgery, was apparently injured during the team's "Organized Team Activity" session today.

"Marlin Jackson was helped off the field and then left bubble walking w/o assistance with Burkholder behind him. Took jersey off his back.", Sheil Kapadia of Philly.com's "Moving the Chains" blog posted on Twitter.

Jeff McLane of the Philadelphia Inquirer tweeted that Jackson was "visibly upset", left the building crying, and was favoring his right knee, which was operated on last October.

A first-round pick out of Michigan by the Indianapolis Colts in 2005, the 26-year old Jackson signed a two-year deal with the Eagles on March 10.

Update: Jackson has reportedly injured his right ankle.