Napoleon Harris will serve a second tour of duty as a Vikings linebacker after signing a contract for the rest of the season. Harris began the year with Kansas City but was unable to crack the depth chart for whatever reason – this after a 2007 campaign which saw him lead the Chiefs in tackles. Harris joins Dontarrious Thomas as a second former Viking brought in to fill the void left by the injuries to E.J. Henderson and Heath Farwell, both of whom have been placed on IR. It is not yet known how the whole linebacker rotation will fill itself out – whether Harris will play the middle right away or wait behind David Herron (who himself might not be able to play this week with a hip injury) or perhaps play outside while Ben Leber plays middle. Dontarrious, it appears, will be more of a special teams contributor, but he does have the advantage of having played in Leslie Frazier‘s system last year, while Harris’s last season with the Vikes came in 2006 under Mike Tomlin.