Roger Clemens not guilty of perjury
Former teammate Andy Pettitte recalled a conversation in which Clemens supposedly admitted using HGH, but Pettitte said under cross-examination that there was a "50-50" chance that he had misheard.
Convicted drug dealer Kirk Radomski supplied McNamee with HGH for a starting pitcher and even sent a shipment to Clemens' house under McNamee's name, but Radomski had no way of knowing if any of the HGH was specifically used on Clemens.
The pitcher's wife, Debbie, admitted receiving an HGH shot from McNamee, but she and McNamee differed over when the injection occurred and whether Clemens was present.
Clemens' lawyers contended that the pitcher's success resulted from a second-to-none work ethic and an intense workout regimen dating to his high school days.
They said that Clemens was indeed injected by McNamee - but that the needles contained the vitamin B12 and the anesthetic lidocaine and not performance-enhancing drugs.
Monday's verdict is unlikely to settle the matter in sports circles as to whether Clemens cheated in the latter stages of a remarkable career that extended well into his 40s - during a period in which performance-enhancing drug use in baseball was thought to be prevalent.
Clemens himself told Congress at the 2008 hearing that "no matter what we discuss here today, I'm never going to have my name restored."
A crucial barometer comes next year, when Clemens' name appears on the Hall of Fame ballot for the first time. His statistics would normally make him a shoo-in for baseball's greatest honor, but voters have been reluctant to induct premier players - such as Mark McGwire and Rafael Palmeiro - whose careers were tainted by allegations of drug use.
Clemens capped an outstanding career with age-defying performances well into his 40s. He went 18-4 and won his seventh Cy Young Award at the age of 41, and the next year posted a career-best 1.87 ERA. His 4,672 strikeouts ranked third in baseball history.
Clemens was invited to testify before the House Oversight and Government Reform Committee in 2008 after he publicly denied accusations made in the Mitchell Report on drugs in baseball that he had used steroids and HGH.
He first appeared at a congressional deposition, where he said: "I never used steroids. Never performance-enhancing steroids." He made a similarly categorical denial at a hearing about a week later, appearing alongside McNamee, who stuck to his story.
Soon after, committee chairman Henry Waxman, D-Calif., and ranking member Tom Davis, R-Va., asked the Justice Department to investigate whether Clemens had lied under oath. In 2010, a grand jury indicted him on the six counts.
Clemens lawyer Rusty Hardin revealed at the time that federal prosecutors made Clemens a plea offer but the former pitcher rejected it.
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