Philadelphia Eagles rookie cornerback Cooper DeJean will be sidelined for approximately the first three weeks of training camp due to a hamstring injury, ESPN reported Tuesday.DeJean reportedly sustained the injury during offseason training workouts.DeJean, 21, was a second-round draft pick (40th overall) in April’s NFL draft after being projected to be selected in the first round. The Eagles made a trade with the Washington Commanders to move up to select DeJean.Last season, DeJean was a first-team All-American at Iowa despite being limited to 10 games after sustaining a broken fibula in practice in mid-November. DeJean had 41 tackles and two interceptions and also returned a punt for a touchdown while averaging 11.5 yards per return.Overall, DeJean had seven interceptions in 30 college games over three seasons at Iowa and returned three of the picks for touchdowns.