Jones missed the Lions' mandatory minicamp this week after undergoing a procedure to address an undisclosed injury, the Detroit Free Press reports. "He had a little bit of an injury that he got taken care of," coach Jim Caldwell noted of the defensive end. While Caldwell didn't specify the nature of Jones' procedure, he indicated that the 29-year-old -- who has had knee issues in the past -- "will be ready to go" for the start of the regular season. While starting all 16 games for the Lions in 2014, Jones recorded 22 tackles, five sacks and two forced fumbles. In his minicamp absence, Devin Taylor and Darryl Tapp split the team's first-unit reps at left defensive end.