Reading Fightin Phils
During the 2012 season, the Giants traded Joseph with Nate Schierholtz and Seth Rosin to the Philadelphia Phillies for Hunter Pence. The Phillies assigned Joseph to the Reading Fightin Phils of the Eastern League. After the 2012 season, he was assigned to the Peoria Javelinas of the Arizona Fall League (AFL), and participated in the AFL Rising Stars Game.