Pwinsider.com confirmed that Cameron Grimes underwent surgery last week, and is out of action until he is cleared to return. His last match took place on December 9th against Timothy Thatcher.
Dave Meltzer reported in the latest edition of the Wrestling Observer Newsletter that Grimes had arthroscopic knee surgery.
The surgery wasn’t due to any specific incident in a match, but rather that Grimes had been having trouble with the knee and wanted to get it taken care of.