Courtroom scorecard: Key players at the Roger Clemens trial

Chron.com is providing extensive coverage of the trial of Texas baseball legend Roger Clemens through our new "Trial of Roger Clemens" blog. TxPotomac staffers Stewart Powell and Will Tucker will be live-blogging and live-tweeting the proceedings. Check the Clemens blog for constant updates and Texas on the Potomac for daily summaries of the action in the Washington federal courthouse. Here are capsule biographies of some of the key figures expected at Clemens' trial on charges he lied about using steroids and human growth hormone.