Proviant Technologies, the maker of the supplement Phillies reliever J.C. Romero took that reportedly led him to fail a drug test, believes he drew a false positive. The maker of 6-Oxo Extreme said the following in a statement to the Philadelphia Inquirer: "While advances in analytical testing and sensitivity in detection of metabolites have made drug testers more proficient at catching cheaters, the unintended consequence is that a perfectly legal and untainted substance can cause a positive test for a banned or illegal substance. "Although little information has been released about the specifics of the alleged positive test, our preliminary investigation of these allegations has uncovered information showing that the main active ingredient in our product will trigger a false positive for androstenedione." However, Major League Baseball isn't buying it. "All I can say about that is that there definitely wasn't a false positive in Mr. Romero's case. We've been through the lab results with the director of the WADA [World Anti-Doping Association] lab in Montreal, and she's completely confident with the report that there was a banned substance in his urine," executive vice president of labor relations and human resources Rob Manfred told MLB.com.