"By all accounts, he was apathetic when coaches weren’t involved in workouts early this offseason, something that didn't sit well with Lions veterans," Birkett writes. "It's unclear if he'll be back this spring and how his petulance will be received once he returns, but he has the potential to be a dangerous No. 2 receiver." [...]It sounds like the Lions veterans are a big reason why Young is not back with the team yet. His time away from the Lions may be coach Jim Schwartz's way of adjusting Young's "apathetic" attitude before he upsets any more teammates.
In his rookie season, Young caught 48 balls for 607 yards and six touchdowns.