|Big Unit goes back on DL with back injury|
|Written by Admin|
|Tuesday, 03 July 2007 10:59|
The Diamondbacks promoted 22-year-old righty Yusmeiro Petit from Triple-A Tucson to pitch in Johnson's place.
Johnson is 4-3 with a 3.81 ERA this year. The 43-year-old lefty had back surgery last October and recently was diagnosed with a herniated disk.
Johnson began the season on the disabled list, then returned to the DL on June 11. The latest move was made retroactive to June 29.
Petit pitched once for Arizona earlier this season. He lost 2-1 at San Francisco on April 22, giving up two runs and four hits in seven innings.