In addition to random drug testing, Iowa State is one of many schools that have "reasonable suspicion" testing. That means players can be tested when their behavior or physical symptoms suggest drug use. Despite gaining 81 pounds in a year, Lamaak said he was never singled out for testing.
The associate athletics director for athletic training at Iowa State, Mark Coberley, said coaches and trainers use body composition, strength data and other factors to spot suspected cheaters. Lamaak, he said, was not suspicious because he gained a lot of "non-lean" weight.
But looking solely at the most significant weight gainers also ignores players like Bryan Maneafaiga.
In the summer of 2004, Bryan Maneafaiga was an undersized 180-pound running back trying to make the University of Hawaii football team. Twice — once in pre-season and once in the fall — he failed school drug tests, showing up positive for marijuana use but not steroids.
He'd started injecting stanozolol, a steroid, in the summer to help bulk up to a roster weight of 200 pounds. Once on the team, he'd occasionally inject the milky liquid into his buttocks the day before games.
"Food and good training will only get you so far," he told the AP recently.
Maneafaiga's former coach, June Jones, said it was news to him that one of his players had used steroids. Jones, who now coaches at Southern Methodist University, believes the NCAA does a good job rooting out steroid use.
On paper, college football has a strong drug policy. The NCAA conducts random, unannounced drug testing and the penalties for failure are severe. Players lose an entire year of eligibility after a first positive test. A second offense means permanent ineligibility for sports.
In practice, though, the NCAA's roughly 11,000 annual tests amount to a fraction of all athletes in Division I and II schools. Exactly how many tests are conducted each year on football players is unclear because the NCAA hasn't published its data for two years. And when it did, it periodically changed the formats, making it impossible to compare one year of football to the next.
Even when players are tested by the NCAA, experts like Catlin say it's easy enough to anticipate the test and develop a doping routine that results in a clean test by the time it occurs. NCAA rules say players can be notified up to two days in advance of a test, which Catlin says is plenty of time to beat a test if players have designed the right doping regimen. By comparison, Olympic athletes are given no notice.
Most schools that use Drug Free Sport do not test for anabolic steroids, Turpin said. Some are worried about the cost. Others don't think they have a problem. And others believe that since the NCAA tests for steroids their money is best spent testing for street drugs, she said.
Doping is a bigger deal at some schools than others.
At Notre Dame and Alabama, the teams that will soon compete for the national championship, players don't automatically miss games for testing positive for steroids. At Alabama, coaches have wide discretion. Notre Dame's student-athlete handbook says a player who fails a test can return to the field once the steroids are out of his system.
The University of North Carolina kicks players off the team after a single positive test for steroids. Auburn's student-athlete handbook calls for a half-season suspension for any athlete caught using performance-enhancing drugs.
At UCLA, home of the laboratory that for years set the standard for cutting-edge steroid testing, athletes can fail three drug tests before being suspended. At Bowling Green, testing is voluntary.
At the University of Maryland, students must get counseling after testing positive, but school officials are prohibited from disciplining first-time steroid users.
Only about half the student athletes in a 2009 NCAA survey said they believed school testing deterred drug use. As an association of colleges and universities, the NCAA could not unilaterally force schools to institute uniform testing policies and sanctions, Wilfert said.
"We can't tell them what to do, but if went through a membership process where they determined that this is what should be done, then it could happen," she said.
Associated Press writers Ryan Foley in Cedar Rapids, Iowa; David Brandt in Jackson, Miss.; David Skretta in Lawrence, Kan.; Don Thompson in Sacramento, Calif., and Alexa Olesen in Shanghai, China, and researchers Susan James in New York and Monika Mathur in Washington contributed to this report.
Contact the Washington investigative team at DCinvestigations (at) ap.org.