WWN Live sent out an email news alert earlier confirming what has been heavily rumored recently. "We can now announce that Sami Callihan has already wrestled on his final DGUSA/Evolve event," states the news alert update. "We want to extend a heartfelt 'thank you' to Sami for being an important part of DGUSA/Evolve history. Calihan started at the bottom of (the) card and through hard work and determination became a main player in the WWNLive family."  

It's almost certain that WWE will rename Callihan in some form or fashion, considering his nickname is "The Callihan Death Machine"

Source: Prowrestling.net