Gonzalez fouled off the first pitch Josh Collmenter threw to him in the ninth inning, and grimaced after the swing. The outfielder immediately exited the game following the swing, causing Todd Helton to replace Gonzalez in the middle of the at-bat.
The left-handed hitter has had a dominant season for the Rockies offensively, hitting .304/.369/.619 with 24 home runs and 63 RBI. Troy Tulowitzki and Dexter Fowler are currently on the DL with injuries, so an extended Gonzalez absence would be another blow for the Colorado offense.
The Rockies will be happy to leave Arizona, as the Diamondbacks outscored the Rockies, 22-2, in a three-game sweep. Roy Oswalt left Sunday's start with an apparent leg injury, dealing another blow to a Rockies team that has gone 7-15 since Tulowitzki landed on the disabled list.