Ruud's metrics show a player who's become less efficient since 2007 in stopping the run, which is the hallmark responsibility for an inside linebacker. Tackles are really are a faux stat, especially when the defense spent as much time on the field as it did last season. Ruud's Stop Rate % in the running game went from 78% in 2007 to 58% and 57% over 2008 and 2009 seasons, respectively (stop rate % vs. run measures an individual player's ability to hold opposing backs to 60% of yards to gain on 1st down, 45% on 2nd down, and 0% on 3rd/4th down on plays in which that player is involved). This dropped his rank among all linebackers from 9th in the league in 2007 to 77th and 87th, respectively. The total yards per play for all plays Ruud was in on ballooned to 4.7 in 2009. Part of this can be attributed to poor line play last year, but Ruud's decline in statistical production can be traced back to the 2008 season.
http://www.footballoutsiders.com/player/16824/barrett-ruud