The Lions have 18 of their 22 starters under contract for next season.

QB Matthew Stafford will be 24 next year. WR Calvin Johnson will be 27. The defensive is anchored by three 25-year-olds, DT Ndamukong Suh, DE Cliff Avril and FS Louis Delmas.

There is a workable mix of youth and experience throughout the roster. The days of annual roster upheaval are over for the Lions. Still, general manager Martin Mayhew faces a daunting offseason.

Gaping holes in the defense were exposed and exploited late in the season by the Packers and the Saints. The run game and the secondary were clearly deficient. There is some aging issues on the offensive and defensive lines, and some durability and depth issues at linebacker and safety.

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