Jodam Rivera, who appeared in three games with the Wizards and hit .100 (1-for-10), will return to Peoria.
Bush was named the best defensive infielder and was rated with the best infield arm in the Padres minor league system by Baseball America's 2006 Best Tools survey. He spent the entire 2005 season with Fort Wayne, hitting .221 with 13 doubles, three triples, two home runs and 32 runs batted in.
Bush, who led the Midwest League with 83 double plays turned, was named to the Eastern Division's Midwest League All-Star team last year.
The Wizards begin the second half of the 2006 season at 7:00 p.m. on Thursday when they host the Cedar Rapids Kernels (Los Angeles Angels of Anaheim affiliate) in the opener of a seven-game homestand.