The Vikings' best four defensive linemen -- Everson Griffin, Jared Allen, Kevin Williams, and Brian Robison -- are all entering contract years in 2013. It's notable for the upcoming draft because the Vikings may be a sleeper team to select a defensive lineman earlier than people expect. GM Rick Spielman has six picks in the top 120. Griffen is technically a backup, but he's flashed dominant pass-rush ability whenever given the opportunity to play. Only 25 years old, Griffen amassed eight sacks, a forced fumble, and a pick six in 2012.