The records show Byrd, who has since retired and lives in Georgia, received his final shipment of growth hormone just before Major League Baseball banned its use in late 2005.
Byrd's case further exposed a pipeline that law enforcement officials said was funneling performance-enhancing drugs to customers across the country while enriching pharmacy operators, complicit doctors and the anti-aging clinics that garnered many customers through the Internet.
Records show D'Amico wrote prescriptions for Teutul and the baseball athletes after his DEA registration expired in June 2003 and he was no longer authorized to prescribe controlled substances.
The business records also identify journeyman pitcher Ismael Valdez as having purchased $11,300 worth of performance-enhancing drugs in 2002, which included prescriptions written by D'Amico.
Pre-trial motions in D'Amico's case focused on his mental condition. Last month, D'Amico's attorneys asked permission to invoke an insanity defense after a federal judge ruled he is competent to stand trial.
Dr. Leonard A. Lado, a Florida psychiatrist, cited D'Amico's mental health issues in a letter last July to one of D'Amico's attorneys, Keith Pierro of Coral Gables, Fla.
"The current working diagnosis with Dr. D'Amico is bipolar disorder along with co-morbid substance abuse complicated by borderline personality disorder," Lado said. "This toxic combination is perhaps one of many reasons for poor judgment and impulsive decisions and unfortunately was never treated correctly."
PowerMedica shut down in June 2005 after it became the target of a federal investigation. The pharmacy's clients included dozens of police officers and firefighters. Daniel Dailey, PowerMedica's owner, pleaded guilty to federal drug charges and was sentenced last August to 46 months in prison.
A 77-year-old New York doctor, Manuel Sanguily of Tarrytown, pleaded guilty last May to writing more than 2,000 blind prescriptions to PowerMedica customers. Sanguily, a former Cuban Olympic swimmer, is scheduled to begin a 30-month prison term on March 1.
It's unclear whether D'Amico's patients, including professional athletes, knew of his problems when he was approving their purchase of steroids and human growth hormone.
D'Amico's spotted record includes the loss of his medical credentials for patient neglect and fraud and a conviction for cocaine possession, records show.
When he was on the payroll of two Florida anti-aging clinics, including Palm Beach Rejuvenation in Jupiter, Fla., most clients never met D'Amico.
"Prospective customers contacted PowerMedica either by telephone or through the website and communicated with PowerMedica salepersons, many of whom had no medical background or training," D'Amico's indictment states. "The unlicensed doctors, including (D'Amico), signed the drug orders without ever meeting with, talking to, conducting physical examinations of, or diagnosing the customers."
PowerMedica wasn't the only anti-aging clinic that put D'Amico on its payroll.
Business records show Teutul, whose spirited personality and bulging biceps helped elevate his celebrity status on "American Chopper," received prescriptions authorized by D'Amico through the now-closed Palm Beach Rejuvenation, whose owners pleaded guilty three years ago in Albany to drug distribution charges.
Teutul received 73 prescriptions at a cost of $51,784.78 between Aug. 2, 2002 and Oct. 3, 2006, the records show. The orders list Teutul's date of birth, Social Security number, telephone numbers, and three addresses tied to him through public records, including an address at 10 Factory Rd. in the town of Montgomery, Orange County. Teutul's motorcycle factory was previously headquartered on Factory Road.
D'Amico's name is listed on 11 prescriptions that records indicate were shipped to Teutul in New York. The prescriptions included human growth hormone, which many people believe slows aging and builds muscle, although those uses are not approved by the federal government. The orders also were for steroids such as testosterone, nandrolone and stanozolol, the records show.
D'Amico's attorney, David J. Joffe of Fort Lauderdale, did not respond to a request for comment.
D'Amico was indicted last March by a federal grand jury in West Palm Beach. He abruptly pleaded guilty Friday to three felony counts of illegal distribution of human growth hormone and steroids, and lying to a federal grand jury. The plea took place two days after prosecutors sought an arrest warrant when D'Amico failed to appear at a pre-trial conference.
He faces up to 20 years in prison and a fine of up to $1 million at his sentencing scheduled for April 22.
Signature's former operators remain under felony indictment in Albany County. They have pleaded not guilty to enterprise corruption and felony drug charges in a case twice dismissed by an Albany judge. The case remains pending on appeal. William J. Dreyer, an Albany attorney for the pharmacy's operators, declined comment.
Human growth hormone is approved by the U.S. Department of Health and Human Services to treat dwarfism in children and people with AIDS wasting disease or growth hormone deficiency. It is illegal to possess or distribute human growth hormone for any other uses.
Orlando's Signature Compounding Pharmacy, which shipped human growth hormone and steroids to customers across the country, shut down four years ago after a law enforcement raid that included Albany County prosecutors.
The pharmacy was subsequently targeted in an administrative complaint filed by the Florida Department of Health 18 months ago. The complaint alleges the pharmacy improperly distributed wholesale amounts of human growth hormone to a physician at a Florida weight-loss clinic.
A spokesperson for the Florida agency said the case is pending.
Carlson, a surgeon who also wrote prescriptions for Teutul through Palm Beach Rejuvenation, was disciplined by Florida's Department of Health after pleading to a felony in the Albany case. He has not been sentenced and agreed to cooperate.
Carlson did not lose his medical license in Florida. He was fined $10,000, received a letter of caution and was ordered to complete 50 hours of community service.
Another doctor who wrote prescriptions to Teutul was Dr. Glenn Johnston, who worked from an office at Signature pharmacy for several years, according to business records.