By Andrew Gould A top Pentagon official expressed concern that Russia is holding detained WNBA star Brittney Griner “as a high-profile hostage” to use as “leverage over the United States.” Evelyn Farkas, the U.S. Deputy Assistant Secretary of Defense for Russia and Ukraine from 2012-15, told Yahoo Sports’ Jeff Eisenberg that Russia may have targeted her as a bargaining chip. “If we want her out of jail, Russia is going to have some terms,” Farkas said. “It could be a prisoner swap. They also could use it as an implicit threat or blackmail to get us to do something or not do something. Either w…