The Steelers have signed OLB Keyaron Fox to a 1-year contract.  He played in 10 games for the Chiefs last season and he made 21 tackles.  Fox has now played in 40 games in his NFL career and he has made 83 tackles, defensed 1 pass, had 1 sack and forced 1 fumble.  Signing Fox was nothing more than a depth move that could benefit the special teams units of the Steelers.