Brown had been out since May 3 with tightness in his right shoulder.
The Rockies also added David Hale as their 26th man for the second game of their doubleheader against San Francisco on Saturday. The right-hander acquired from Atlanta last winter will make his Colorado debut.
A left oblique strain squelched Hale's bid for the No. 5 starter job in spring training. He rehabbed in the minor leagues and started the season at Triple-A Albuquerque.