The 28-year-old, who also twisted his right ankle two weeks ago, is hoping to return before the end of the season. Just a few days ago, Gonzalez and his wife brought home one of their twins, who were born prematurely in June.
"CarGo is dealing with a lot right now," said Rockies head trainer Keith Dugger. "It's multiple injuries. You can see mental stress on him. You can see physical stress. Basically there comes a point in time when he's not performing at the rate he wants to. He feels bad. [Manager] Walt [Weiss] feels bad putting him in the lineup."
Gonzalez left Friday's loss in Arizona after going 0-for-3 with three strikeouts. Gonzalez, who is hitting .238 with 11 homers and 38 RBIs in 70 games this season, was on the DL earlier this year with left index finger inflammation. He missed five weeks.
The Rockies (45-71) had MLB's worst record entering Sunday and had lost eight of nine and 11 of 13.
- Chris Mascaro