Steriods in fighters past fights?

I think these guys who use steriods have been using them for a while. I doubt they just got an injury and decided to use it to recover quicker. Does anyone else think most of these guys fought on steriods in past fights where they may have been able to fake the test results?

Every fighter's scenario is different.

"Does anyone else think most of these guys fought on steriods in past fights where they may have been able to fake the test results?"

Sure. It's possible and I wouldn't be surprised at this point.