MLive will preview each of the Detroit Lions' position groups heading into the start of training camp on July 27. Today: Defensive line. Previously: | Quarterback | Offensive line | Receiver/tight end | Defensive line
Roster locks: Jarrad Davis, Devon Kennard, Christian Jones
Competing: Jalen Reeves-Maybin, Steve Longa, Jonathan Freeny, Trevor Bates, Al-Rasheed Benton, Chad Meredith
Notable departures: Tahir Whitehead, Paul Worrilow
Breakdown: The Patriots never finished outside the top 10 in scoring defense under Matt Patricia. They were tough no matter who they ran out there -- no matter who they lost to injury or free agency.