Major League Baseball officials have contacted the DEA and U.S. Attorney's office in Southern Florida in an effort to unmask the names of any players who might have violated the league's drug policy, sources told ESPN's "Outside the Lines." Federal officials are discussing how to honor the request, which follows months of mutual frustration between MLB and the DEA over their parallel investigations into the Biogenesis clinic and related criminal activity. Two federal law enforcement sources told "Outside the Lines" on Tuesday that a number of previously undisclosed players had been identified through the DEA's Operation Strikeout and that they expected those names to be made public through the discovery process of the case. MLB officials, however, are seeking the release of those names as soon as possible in order to begin disciplinary proceedings against the players. DEA officials said this week that Tuesday's arrests were only the first phase of their investigation and that others are expected to follow. One source said five players have been identified during the investigation, although it is not clear whether all five are on major league rosters. Two law enforcement sources said the evidence that the players received banned substances was compelling and that they expect MLB to suspend the players.