Patrick Delvan (Pat) Westrum (born March 3, 1948 in Minneapolis, Minnesota) is a retired professional ice hockey defenseman who played 237 regular season games in the World Hockey Association for the Minnesota Fighting Saints, Calgary Cowboys and Birmingham Bulls between 1974 and 1978. Westrum also was a member of the United States national team at the 1978 Ice Hockey World Championship tournament in Prague.
He played college hockey for the University of Minnesota from 1967 to 1970 and then represented the United States at the 1971 World Championship. He then played minor pro hockey until 1974 when he signed with the Minnesota Fighting Saints of the World Hockey Association (WHA).
Westrum played in the WHA through the 1977-78 season. He scored 7 goals and 45 assists in 237 games.
He played two more seasons of minor pro and retired in 1980.