3:00 PM: The move is official, MLB.com's Jason Beck reports (on Twitter).
1:46 PM: The Tigers will return Rule 5 Draft pick Jeff Kobernus to the Nationals, Amanda Comak of the Washington Times reports (on Twitter). He will return to the Nats' minor-league system. Kobernus, an infielder, .282/.325/.333 in 330 at bats for Double-A Harrisburg in 2012. In accordance with Rule 5 guidelines, the Nationals will have to pay the Tigers $25K in exchange for Kobernus.