09/22/12 1:05 AM ET
Gonzalez exits early due to strained right hamstring
By Clark Goble / MLB.com
"All of a sudden, it didn't look like it was right, so we went out and he did tweak it," DeFrancesco said. "Right now, I haven't had any reports on it, but hopefully it wasn't too bad."
Gonzalez wasn't available for comment after the game. Reliever Fernando Rodriguez came on and delivered 3 1/3 scoreless innings in the Astros' 7-1 victory.
Gonzalez, 29, signed as a free agent with the Astros on Aug. 23. He was 2-1 in his first three starts with a 4.40 ERA.
Clark Goble is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.