Esposito successfully defended his Senior Open title with a -5/137 to win by two strokes over Brent Studer and Jim McGovern.
Mackey defeated Carl Hays on the 22nd hole to win the event for the second straight year.
Cowell, a former Met Open, State Open and Player of the Year in the Section and Warms, the 1995 National Junior Golf Leader Award winner and 12-time Section Junior Golf Leader Award winner, are the latest additions into the Hall of Fame.
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