From the AP:

Former major leaguer Chuck Knoblauch had not been tracked down as of early Wednesday evening by federal marshals trying to serve him a subpoena from a House panel investigating steroids in baseball, a committee staffer told The Associated Press. ...

Knoblauch, a four-time All-Star who played for the Yankees, Twins and Royals from 1991-02, originally was asked to appear Thursday for what was supposed to be the first of five depositions or transcribed interviews scheduled by the House Oversight and Government Reform Committee.

Via Peter Abraham.