The Steelers have signed defensive end Aaron Smith to a 4 year, $25 million contract extension.  This was a good move by the Steelers as they’ve locked up a core player to their defense.  Smith played in all 16 games last season for the Steelers and he made 61 tackles, had 4.5 sacks, forced a fumble and recovered a fumble.  Over his career, Smith has played in 118 games in his career and has made 330 tackles, sacked the QB 34 times, defensed 15 passes, forced 7 fumbles and recovered 7 fumbles.