Clemens originally was asked to appear Saturday for a deposition or transcribed interview with staff members from the House Oversight and Government Reform Committee. That panel has called a Feb. 13 hearing where Clemens and his former personal trainer, Brian McNamee, are among five witnesses slated to appear.

The committee announced a new schedule Thursday of pre-hearing meetings with those witnesses.

Chuck Knoblauch, a former teammate of Clemens' with the Yankees, was subpoenaed to appear for a deposition or transcribed interview on Tuesday, although the committee said he has yet to be served.

Andy Pettitte, a longtime teammate and workout partner of Clemens', has been asked to appear Jan. 30, with McNamee down for Feb. 7.

The fifth witness, former New York Mets clubhouse employee Kirk Radomski, originally was invited to meet with committee staff on Feb. 1, but his deposition or interview was given Thursday as "TBD" — to be determined.

Lawyers for Clemens and McNamee have said their clients will appear.

In the Mitchell Report on doping in baseball, McNamee said he injected Clemens with steroids and human growth hormone, accusations the pitcher with the eighth-most wins in major league history has denied repeatedly. Pettitte acknowledged McNamee injected him twice with HGH while the left-hander was recovering from an injury.

McNamee also told Mitchell he acquired HGH from Radomski for Knoblauch in 2001 and injected Knoblauch with HGH.