Marlin Jackson's injury impact 8:18 AM ET Marlin Jackson | Eagles Top Email This offseason, defensive back Marlin Jackson was brought in by the Philadelphia Eagles as a possible solution to their need on the safety level. It was revealed at one point that his deal was incentive-laden, largely related to the fact that he had suffered multiple serious knee injuries in the past, and his ability to stay healthy was questionable. Jackson is hurt again, but this time, it's his ankle. Geoff Mosher of the News Journal reports that Jackson suffered a right ankle injury in practice Tuesday, and as Mosher puts it, it's "only good news because it's not the knee." Jeff McLane of the Philadelphia Inquirer chimed in, revealing word from a source that although it's too early for a full prognosis, it "doesn't seem great." Later on, the Eagles confirmed that Jackson has ruptured his Achilles tendon, ending his season before the season even began. With Jackson sidelined, it would appear that the Eagles could slide Macho Harris back to free safety for the time being, per McLane. But they also have second-round draft pick Nate Allen in the mix. According to ESPN NFC East blogger Matt Mosley, they could also go that route, although with the aggressive way the team plays defense, it puts a lot of pressure on the safeties, a tall task for a rookie.