MARCO GARCIA/Associated Press
The tackle spots are set in stone with a pair of former first-round picks.
Ndamukong Suh and Nick Fairley are the men in the middle. The two former first-round picks provide the Lions with one of the most formidable and talented tackle duos in the league, though a little more productivity would be a welcome development.
Suh is coming off a Pro Bowl season where he was consistently one of the most disruptive interior linemen in the NFL. He finished second among all tackles in PFF's ratings last year.
Fairley is under some pressure as he enters the final year of his rookie contract. The Lions declined the fifth-year option on his contract, citing questions about his effort and discipline. As noted by MLive's Kyle Meinke in a great op-ed piece, Fairley is very likely playing for his next contract with another team.
Last year's first-round pick, Ezekiel Ansah, will start at one defensive end spot. He validated his lofty draft status right away; Ziggy notched eight sacks and two forced fumbles as a rookie, flashing the dynamic potential he offers.
The position in question is left defensive end. Jason Jones began 2013 as the starter, but he suffered a knee injury in Week 3 that ended his first season in Detroit.
Willie Young took over for the rest of the season, but he is now a Chicago Bear.
Jones will get a chance to reclaim his starting role in 2014, but he will have to fend off some challengers.
Foremost among those is 2013 fourth-round pick Devin Taylor, who flashed some ability in an expanded role late in the season. The 6'7" Taylor could assume a much bigger role in 2014, especially if Jones struggles.
Free-agent acquisition Darryl Tapp could factor in as well, though he's been a journeyman for several years now.
It's not out of the question that the Lions draft an edge pass-rusher that could start at right end, pushing Ansah to the left side, but that seems unlikely.