Adrenaline Mob are down another member and it's taken them by a bit of surprise. The group was planning a fall trek, but may have hit a bump in the road with bassist John Moyer's announcement that he will not be around for the trek.

Moyer, who is also a member of Disturbed, informed fans of the situation via a message on his Facebook page. While it's not certain if his time away from Adrenaline Mob is permanent, the rocker did reveal that he would not be available for the fall tour. His posting on the matter can be read below.

Thanks to all the Adrenaline Mob fans for the support! Unfortunately I will NOT be joining them on this next run. My best to Mike Orlando , Russell Allen, & Aj Pero. Have a great tour guys!

While Moyer did not state why he wouldn't be part of the trek or what his other commitments may be, there are some speculating that Disturbed may finally be ending their hiatus. The group took time off while the band members splintered off into a variety of side projects. But Moyer's exit apparently came as a surprise to his Adrenaline Mob bandmates, who offered their own comments on the situation which can be read below.

We @Adrenalinemob are totally shocked by John Moyer 's announcement via Twitter today that he will not be touring with us in September. We knew he had some other commitments that might have caused him to possibly pullout but we were hoping to have him on board. Obviously he's got something else going on. We wish him all the best and he will be missed but AMOB WILL be Doing the shows... We will announce the new bassist as soon as we have one.. Stay Tuned....

There are a few dates already announced for September. You can see all of the band's forthcoming tour dates at this location.

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