John Andrew Mackin (né Macknowski; January 7, 1923) is a Russian-born American former professional basketball player.^[1] He played in the National Basketball League (NBL) and National Basketball Association (NBA) for the Syracuse Nationals franchise as the team moved from the NBL into the NBA.^[1][2]

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Johnny Macknowski

Personal information
Born	(1923-01-07) January 7, 1923 (age 101) Russian Soviet Federative Socialist Republic, Soviet Union
Nationality	American
Listed height	6 ft 0 in (1.83 m)
Listed weight	180 lb (82 kg)
Career information
High school	Lincoln (Jersey City, New Jersey)
College	Seton Hall (1945–1948)
BAA draft	1948: – round, –
Selected by the Rochester Royals
Playing career	1947–1951
Position	Guard / forward
Number	5
Career history
1947–1948	Scranton Miners
1948–1951	Syracuse Nationals
Career NBA statistics
Points	823 (7.0 ppg)
Assists	134 (1.1 apg)
Stats  at NBA.com
Stats  at Basketball-Reference.com

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Macknowski played college basketball for the Seton Hall Pirates where he started as a freshman in the 1941–42 season and then served three years of military service during World War II.^[3] He returned to the Pirates and played from 1945 to 1948.^[3]

After his playing career, Macknowski worked as an English, history and philosophy teacher.^[4]

In 1952 he changed his surname from Macknowski to Mackin.^[5] He has three daughters with his wife, Olga, who predeceased him in December 2016, aged 90.^[6] As of September 2017, Mackinowski, then 94, resided at a retirement village in Morristown, Tennessee.^[7] He turned 100 in 2023, becoming only the second NBA player to turn 100, after Whitey Von Nieda.^[4]