UFC on FUEL TV 2 drug test results are in from UFC Vice President of Regulatory Affairs Marc Ratner (via MMAWeekly.com), who yesterday confirmed that 24 fighters tested for illegal/banned substances after competing at the "Gustafsson vs. Silva" event on April 14 have all passed with flying colors.

Main event participants Alexander Gustafsson and Thiago Silva, as well as every other fighter competing on the card, were all screened for performance enhancers such as steroids and drugs of abuse like cocaine and marijuana, among others.

Results from these battery of tests all came back negative.

Typically, fighters are selected randomly for drug tests. However, athletic commissions typically test the main event participants and fight night winners, as well as those who have failed drug tests in the past.

UFC on FUEL TV 2: "Gustafsson Silva," featuring Alexander Gustafsson continuing his rapid rise up the light heavyweight ladder by soundly defeating the returning Thiago Silva.

The next Jon Jones? We shall see.

Brian Stann got back on the hog despite extensive trouble at home with one of the sickest knockouts you'll see this year. That's because he put Alessio Sakara out with short shots from guard inside the first round.

And what's there to say about Siyar Bahadurzada and his 42 second destruction of Paulo Thiago?

For a complete wrap up of the UFC on FUEL TV 2 event click here.