Obviously both Dallaglio and Johns were done for recreational drugs but I'd be amazed if performance enhancers weren't rife. Human beings are human beings, are we really to believe that athletes in sports such as cycling and track and field are fallible whereas those in rugby, football, tennis etc. are saints?
I mean Juventus were embroiled in a nandrolone issue during the 90's. Their doctor was jailed but none of the players done for it. Considering the likes of Zidane, Vialli, Del Piero and Baggio were at the club at the time, can they be regarded as clean? Why if the doctor has been found guilty are the players not stringently tested? Since then Edgar Davids, Jaap Stam and Frank de Boer have all had bans for nandrolone. All have been welcomed back into the sport.
Around the time of the Juve doping issue, the players at Parma were found to have high levels of haematocrit, regarded as a sure sign of EPO use. A quick read of the Marco Pantani biography reveals how rampant doping is in Italian sport.
In 2006 cycling was rocked by the Operation Puerto case that saw the likes of Jan Ullrich and Ivan Basso banned from the sport and cycling washed its linen very publically. Of the 200 or so athletes named in the sting, only 39 were cyclists. What's happened to the other 160 or so athletes from other sports? Le Monde had reported in December 2006 that they had possession of documents of Fuentes detailing "seasonal preparation plans" for Spanish football clubs FC Barcelona and Real Madrid. Fuentes, the doctor involved in it, has been indignant that only cyclists have been named and it's widely believed that footballers and tennis players were regulars at his establishment. Hope they've got a mighty big rug.