Citing personal reasons, a Microsoft press release today announced that Peter Moore has resigned from Microsoft effective the end of August. Less than a week after wrapping up E3, Moore`s decision will allow him to return to the San Francisco area to continue working in the video game industry with a new company. The replacement will be Don Mattrick, a former president of Electronic Arts, who will oversee the Interactive Entertainment Business (IEB), including the Xbox and Games for Windows brands. See the full release after the jump for details.

Update (Chuck) - According to IGN Peter Moore is going to EA to head up EA Sports.