No additional sources other than the TFCon Facebook page, but it appears that he has passed. I was at the Chicago TFCon last year, and I recall that he had missed a planned appearance there due to a head injury. If true, RiP. TFcon
It's too bad he was unable to attend TFCON last year, but according to that tweet from TFCON, he really is not the same guy as the stuntman Bud Davis, who portrayed the Phantom Killer in the 1976 movie The Town That Dreaded Sundown? Bud Davis - Transformers Wiki
RIP Bud Davis. I tried to see if I could find an online obituary with more information, but unfortunately it turns out that Bud Davis is a very common name, and none of the obituaries I found mentioned voice acting.
RIP Dirge. May Mr Davis forever be remembered and live on in the Alldpark. We should make a thread listing all the VAs we've lost.
my guess is, he lived quite a reclusive life, since not much is known about him, but damn, its another tragedy, another member from the G1 family is gone., sucks he missed out on attending TFCon in Chicago last year