Strikeforce Challengers 17: "Voelker vs. Bowling 3" drug test results are in from the Nevada State Athletic Commission, who today confirmed that all 12 fighters tested for illegal/banned substances have passed with flying colors.

Fighters that competed on the card that were tested were all screened for performance enhancers such as steroids and drugs of abuse like cocaine and marijuana, among others, after competing at the "Voelker vs. Bowling 3"-branded event on Fri., July 22, 2011 from the Palms Casino Resort in Las Vegas, Nevada.

Results from these battery of tests all came back negative.

The fighters who were tested were randomly selected. However, athletic commissions often test the main event participants, as well as those who have failed drug tests in the past.

Strikeforce Challengers 17 featured the conclusive final of the ongoing feud between Bobby Voelker and Roger Bowling, which Voelker won convincingly by kneeing Bowling into oblivion in the second frame.

That's two for Bobby, just one for Rogers.

Also on the docket was rising light heavyweight prospect Ovince St. Preux, who handily defeated Joe Cason to continue his slow ascent up the ranks of the 205-pound division.

Get down with "OSP" 

In other action, Devin Cole defeated late replacement Shawn Jordan and Sarah Kaufman took it to Liz Carmouche to potentially earn herself another crack at a women's championship.

For complete "Voelker vs. Bowling 3" results and blow-by-blow coverage of all the main card action click here and here.