Ryan Clark may be nearing the end of his career in the NFL with the Pittsburgh Steelers.

Clark has become a leader by example during his tenure in Pittsburgh, since signed as a free agent released by the Washington Redskins. A bone-crushing enforcer using his physical play to uphold the standard, Clark had become the standard.

Unfortunately, the salary cap has no mercy for aging veterans who have earned every single penny of their modest pay.

Off the field, Clark had also become a leader for the Steelers social networking campaign, setting benchmarks for interactivity between players and fans, primarily on Twitter. His personal attachment to his team's fanbase has led Clark to speak on behalf of #SteeleersNation.

Today, Clark's twitter account has been shut down, with no explanation.