Charlie O'Brien
Charles Hugh O'Brien (born May 1, 1960 in Tulsa, Oklahoma) is a former Major League Baseball catcher who played 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).
O'Brien was a solid defensive catcher and a modest right-handed batter. He is best remembered for pioneering the hockey-style catcher's mask. He was playing with the Toronto Blue Jays when he invented this different style of mask.