Athletes Who Used Steroids: High-Profile Doping Cases

Many of the most famous athletes in history have been caught using anabolic steroids, from sprinter Ben Johnson and cyclist Lance Armstrong to baseball sluggers of the Steroid Era and, more recently, tennis No. 1 Jannik Sinner. These cases stripped medals, erased records, and rewrote reputations. Below are the highest-profile steroid scandals in sport and how each one reshaped anti-doping.

What counts as a steroid case

Anabolic-androgenic steroids (AAS) mimic testosterone. They speed up muscle protein synthesis, shorten recovery time, and in some forms increase red blood cell production. Every major sports organization and the World Anti-Doping Agency (WADA) ban them at all times, in and out of competition. Penalties range from short suspensions for contamination cases to lifetime bans and the erasure of results from the period of use. What makes a case “high-profile” is usually a combination of the athlete’s stature, the substance involved, and how much of the record book had to be rewritten afterward.

The most notorious steroid cases

Ben Johnson (athletics). Johnson’s 1988 Seoul Olympic 100m gold is still the doping scandal people reach for first. His 9.79-second world record was annulled after he tested positive for stanozolol, and the gold went to Carl Lewis. The fallout pushed federations toward stricter out-of-competition testing.

Marion Jones (athletics). The top female sprinter of her generation admitted in 2007 to using the designer steroid THG (“the clear”), supplied through the BALCO network. She forfeited five Olympic medals from the 2000 Sydney Games and served prison time for lying to federal investigators.

Lance Armstrong (cycling). Armstrong’s seven straight Tour de France titles, won from 1999 to 2005, were all stripped after a USADA investigation found he had run a highly organized, team-wide doping operation involving steroids, EPO, and blood transfusions. His case exposed how widespread doping was across the professional peloton.

Alex Rodriguez (baseball). A-Rod admitted to using steroids with the Texas Rangers from 2001 to 2003, then was suspended for the entire 2014 season over ties to the Biogenesis of America clinic — the longest PED-related ban in MLB history at the time.

Justin Gatlin (athletics). The 2004 Olympic 100m champion served a four-year ban after a 2006 testosterone positive, his second anti-doping violation. He returned to compete at the highest level, winning the 2017 world 100m title before retiring in 2022.

Sports hit hardest

Baseball’s Steroid Era ran roughly from the late 1980s through the mid-2000s. The 2007 Mitchell Report named dozens of players linked to performance-enhancing drugs, and home-run records from that stretch are still argued over. Strength sports have dealt with anabolic steroids for decades — powerlifting still splits into tested and untested federations largely because of it. Cycling’s endurance culture made it a repeat offender, and even professional wrestling, not a competitive sport in the traditional sense, has faced scrutiny over steroid-linked health problems among performers.

Key cases at a glance

Athlete	Sport	Substance	Consequence
Ben Johnson	Athletics	Stanozolol	1988 Olympic gold stripped
Marion Jones	Athletics	THG (The Clear)	5 Olympic medals forfeited
Lance Armstrong	Cycling	Multiple PEDs	7 Tour de France titles stripped
Alex Rodriguez	Baseball	Multiple PEDs	Full 2014 season suspension
Justin Gatlin	Athletics	Testosterone	4-year ban (2006)
Jannik Sinner	Tennis	Clostebol	3-month ban (2025)

Steroid cases in 2024-2026

The steroid story did not end with the BALCO generation. In March 2024, tennis world No. 1 Jannik Sinner twice tested positive for clostebol, an anabolic steroid. The International Tennis Integrity Agency ruled the trace amounts came from a physiotherapist’s massage rather than intentional doping, but WADA appealed. In February 2025, Sinner accepted a three-month ban in a settlement — WADA agreed he had not intended to cheat and gained no performance benefit. The timing meant he missed no Grand Slam, which fueled debate about whether star players receive lighter treatment.

Rule-making also moved forward. WADA’s 2026 Prohibited List, in force from 1 January 2026, extended the ban to all esters of prohibited anabolic steroids — an ester being a chemical tweak that changes how long a drug stays active in the body. The update also added clarifying examples across anabolic agents and SARMs (selective androgen receptor modulators), which increasingly show up in doping cases in place of classic steroids.

The impact on anti-doping

Each scandal forced a policy response. BALCO led directly to new tests for designer steroids that had previously gone undetected. The MLB scandal produced the Joint Drug Prevention and Treatment Program. Armstrong’s case exposed how little oversight the UCI had over its own sport. WADA’s Whereabouts program, which requires elite athletes to report their daily location for out-of-competition testing, exists because these cases proved that testing only at events was never enough. From Ben Johnson to Jannik Sinner, the pattern holds: results get celebrated first and reconsidered later, and every high-profile case tightens the net a little further for the next generation of athletes.