The players had planned to visit the popular holiday destination later this week but quickly moved to change plans after the incident.
Essendon coach James Hird said the decision was made out of respect for the McCarthy family.
""When we all found out about John we were very shocked and felt for his family,"" Hird said.
""Our view was that the respectful thing to do was to not go to Las Vegas as the players wanted to show respect to John, his family and the Port Adelaide Football Club.""
""The whole of the Essendon Football Club is feeling for them terribly.""
The players will now make alternate arrangements.
