Experts evaluate Clemens' recent contentions

0 Comments | USA TODAY, January, 2008 | by A.J. Perez

After more than three weeks of silence, Roger Clemens went on the record -- first with 60 Minutes on Sunday and then with reporters in Houston on Monday. His initial steps to restore his reputation have also led Clemens' legal team to file a defamation suit against Brian McNamee, the trainer who said in the Mitchell Report released last month that he injected Clemens with steroids and human growth hormone.

Medical and legal experts weigh in on selected statements Clemens has made this week:

*Clemens says: The only things McNamee injected him with were lidocaine and vitamin B-12.

*Expert says: "B-12 is not uncommon," says Warren King, a California-based orthopedic surgeon who has worked with several pro sports teams. "Some nutritionists say it helps...