Charles Hugh O'Brien (born May 1, 1960) is an American former professional baseball player. He played in Major League Baseball as a catcher for the Oakland Athletics (1985), Milwaukee Brewers (1987–90), New York Mets (1990–93), Atlanta Braves (1994–95), Toronto Blue Jays (1996–97), Chicago White Sox (1998), Anaheim Angels (1998–99) and Montreal Expos (2000).