SAN DIEGO - The Cubs don't know if Matt Garza will pitch again this season.
Further examination in Chicago revealed a stress reaction in the back of Garza's right elbow.
Garza - who hasn't pitched since experiencing cramping around his triceps on July 21 - is out indefinitely and will be placed on the disabled list.
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Brooks Raley will be promoted from Triple-A Iowa and start Tuesday night in San Diego.