It's the third Minors signing in the past three weeks designed to improve the Orioles' infield depth. On Feb. 7, they signed Robert Andino and Johnny Giavotella to Minor League contracts with invitations to Spring Training.
With second baseman Jonathan Schoop heading to the World Baseball Classic on Tuesday to play for the Netherlands, and Manny Machado leaving on March 5 to play shortstop for the Dominican Republic, the Orioles need additional infielders during the time they're away.
Hardy has yet to play because of back spasms, and he isn't supposed to be ready until about March 10.