The Cubs selected Murray's contract from Triple-A Iowa on Tuesday.
Murray has put together a fine season at Iowa, slashing .294/.395/.500 with 16 home runs, nine stolen bases and a 69:110 BB:K over 118 games. He's primarily a corner infielder but can handle left field as well. Murray is starting at designated hitter and batting eighth Tuesday versus the Brewers in his major-league debut.