Former Dream Theater drummer Mike Portnoy revealed that he has parted ways with Avenged Sevenfold.

Portnoy posted the following on his Facebook page:

Yes, the rumours are true...sadly my time with Avenged Sevenfold has come to an end...
The band has decided to carry on into 2011 without me...I had a great time with them throughout 2010, but it was their choice to end the relationship at the end of 2010 as was always the initial plan....
I had an awesome time on stage with the guys every night and have so many cool memories from the experience with them...I am proud to always be part of the A7X family and history.
I also adore the A7X fans and totally appreciate the way they welcomed me aboard and were so loving and supportive during my time with the band...thank you!
As far as my future, I am excited by the endless musical possibilities that lie ahead of love for music runs very deep and my taste is very broad and ecclectic which will give me the chance to explore many different things and collaborate with many great friends and artists I admire and respect...
Happy Holidaze to you all and c-ya in the New Year,
While A7X did not immediately respond to Portnoy's statement, M. Shadows did tell The Pulse of Radio that they were not too happy about the public way Portnoy split from Dream Theater, the band he's been part of for 25 years.

“We were actually a little more shocked,” M. Shadows said.  “We felt that maybe both parties could have handled it a little more internally without being so press release-happy about what had happened between them.  Because we’re a band that, really, when it comes to news all over web sites or this or that about bands, you know, we don’t tweet much, we don’t try to put ourselves out that much, and all the drama and controversy wasn’t something that we wanted at all.”

has the full interview.

Portnoy filled in on drums when founding drummer Jimmy "The Rev" Sullivan was found dead in his home last December.  No replacement has been announced yet, and A7X will start touring next year.  GRD welcomes Avenged Sevenfold, with special guests Stone Sour, Hollywood Undead, and New Medicine, February 4 to the Kellogg Arena in Battle Creek.

Who do you think should be the new stickman for Avenged?