"It's disappointing to see this sort of incident happen in the public domain and the sporting field, at a time when we're trying to promote good sideline behaviour."
Sport Canterbury West Coast was trying to focus on the positive side of sport, including rewarding positive sideline behaviour.
Mr O'Connor said hockey was a rough sport but the assault, which he witnessed, was unacceptable.
"With any contact sport there's always confrontation. To see it escalate is disappointing."
West Coast Hockey Association president Peter Henderson agreed the incident was disappointing, and said any disciplinary action would depend on a committee meeting and the results of the court case.