The team's top pitching prospect, right-hander Brad Lincoln, was called up from Triple-A following Tuesday night's game in Washington and will start Wednesday night against the Nationals.
Second baseman Neil Walker has become a starter since his May 25 recall, meaning three of Pittsburgh's top four prospects have been brought up since the season began. Third baseman Pedro Alvarez, the No. 2 pick in the 2008 draft, remains at Indianapolis.
First baseman Jeff Clement was optioned to Indianapolis to make room for Tabata.