Davis Passfield (born 20 August 1990), better known by his ring name Mark Davis, is an Australian professional wrestler. He is signed to All Elite Wrestling (AEW), where he is a member of the Don Callis Family. He also appears in its sister company Ring of Honor (ROH), where he is a former one-time ROH World Tag Team Champion. He also appears for New Japan Pro-Wrestling (NJPW), where he is a former IWGP Tag Team Champion, and record-setting and inaugural two-time Strong Openweight Tag Team Champion and Revolution Pro Wrestling, where he is a former two-time Undisputed British Tag Team Champion.

From 2017 to 2024 he teamed with fellow Australian wrestler Kyle Fletcher as the tag team Aussie Open and both were members of the United Empire. They have also made appearances for All Elite Wrestling and British independent promotions such as Progress Wrestling and Attack! Pro Wrestling. Davis commonly made appearances for Australian Independent Promotions from 2007, such as Melbourne City Wrestling, during his early career.