The Pittsburgh Steelers made a number of significant moves this offseason in an effort to bolster their defense, which ultimately resulted in them bringing in four new starters in a process that continued through the regular season.
Jon Bostic was replaced with essentially a two-fer in first-round pick Devin Bush and free agent Mark Barron at inside linebacker, and the two are frequently on the field together, even though Vince Williams of course still has a key role that is expanding now to mitigate the loss of Stephon Tuitt.