Samuel and Jackson are two of the team's key offseason additions.
The Eagles signed Samuel to a six-year, $57 million free-agent deal and selected Jackson with their second pick in the draft, 49th overall.
Jackson, a standout returner out of Cal, is being called on to return kickoffs and punts. He set a Pac-10 record by returning six punts for touchdowns in his career.
Also, the Eagles signed fourth-round pick Mike McGlynn to a four-year deal.
McGlynn, an offensive lineman out of Pittsburgh, is the second of the Eagles' 10 draft picks to sign. Safety Quintin Demps signed last week.