Jackson joined his teammates at Lehigh University on Monday, though he didn't practice in the morning. A two-time Pro Bowl pick, Jackson wants a new contract. He is slated to earn $565,000 this season, the final one of his four-year rookie deal.
Jackson caught 47 passes for 1,056 yards and six touchdowns last year, and his 22.5 yard-per-catch average was best in the NFL. He also averaged 11.6 yards on 20 punt returns, including a 65-yarder for a TD that beat the New York Giants on the last play of a game in the Meadowlands on Dec. 19.
If Jackson hadn't reported by Tuesday, he could've lost a year of service time toward free agency.