There are two bands that have used the name Chelsea Grin:
These are photos from concerts where Chelsea Grin played, so they may be of other bands that played the concert as well.
The All-Stars Tour Aug 5, 2013 Mesa, Arizona, United States Uploaded by Trevor Ronde
Soundwave Festival 2013 Feb 23, 2013 Bowen Hills, Queensland, Australia Uploaded by Stephen Fay