I find it interesting that nobody thinks Casey Combest was juiced?.
Would that observation/realisation be based more towards his body type (ectomorph) as opposed to a more endomorph/muscular body type?.
Appearance means nothing. Heaps of skinny looking soccer players have tested positive for various anabolic steroids.
Anabolic steroids other than testosterone are pretty easily detected now and athletes have shifted towards using a cocktail of testosterone, HGH, insulin and thyroid hormones which unfortunately are almost almost undetectable. HGH can so far only be detected in blood which is not tested outside of competition. Athletes can use HGH all off season without having to worry. Testosterone testing is based on a ratio of testosterone to epitestosterone. Take moderate doses and keep yourself under 4:1 and again, no worry with testing. Insulin cannot be tested for at all and testing for t3 and t4 is extremely rudimentary. Sprinters and other more general athletes are also using EPO to improve endurance and recovery.
WADA aren't even particularly coy about how easy it is to work around the testing:
http://articles.latimes.com/2007/dec/15/science/sci-baseball15Dwain Chambers was taking HGH, testosterone, insulin and T3 while being tested multiple times over more than a year and none of it was detected. That's how useless the testing is.