The North Atlantic has parted ways with their drummer, Cullen. He made the announcement via San Diego music blog, Dirtbag's Delight:

The July 27th show, at Black Box Studios in San Diego, will be my last hometown show with The North Atlantic. Our performance at Denverfest, over Labor Day weekend, will be my last show with the band, period. I'm closing in on a finished dissertation and will be setting my sights on contributing to the world through scholarship, journalism, and playing music in and around my hometown (San Diego for the present). I'd like to invite all our friends and fans in San Diego to join us on the 27th, and help us welcome our good friends Ghost Buffalo to town.

You can check out the rest of his statement here.