Full name: John A. "Jack" Zivic
Height: 5-6 (168 cm)
Weight: 126 lbs (57 kg)
Born: June 23, 1903 in Pittsburgh, Pennsylvania, United States
Died: May 22, 1973 in Wilmington, Delaware, United States
Affiliations: Willow Athletic Club
Country: United States
Related Olympians: Brother of Pete Zivic.
Jack Zivic was one of five Zivic brothers who fought professionally – Joe, Jack, Fritzie, Eddie, and [Pete]. Jack and Pete worked in steel mills around Pittsburgh when they were chosen to represent the US at the 1920 Antwerp Olympics. The best of the brothers was Fritzie who was World Professional Welterweight Champion from October 1940-July 1941. Jack Zivic turned professional in 1921 and fought through 1930, finishing with a professional record of 39 wins, 29 losses, and 4 draws. He never fought for a major title.
|1920 Summer||16||Antwerpen||Boxing||Men's Featherweight||United States||USA||4|
|1920 Summer||16||Antwerpen||Boxing||United States||USA||Final Round||Match 3/4||2||1920-08-24||Garzena (ITA) , Zivic (USA)|
|1920 Summer||16||Antwerpen||Boxing||United States||USA||Semi-Finals||Match #1||2||1920-08-23||Gachet (FRA) , Zivic (USA)|
|1920 Summer||16||Antwerpen||Boxing||United States||USA||Quarter-Finals||Match #1||1||1920-08-23||Zivic (USA) , Clausen (DEN)||decision|
|1920 Summer||16||Antwerpen||Boxing||United States||USA||Round Two||Match #2||1||1920-08-22||Zivic (USA)||walkover|
|1920 Summer||16||Antwerpen||Boxing||United States||USA||Round One||Match #3||1||1920-08-21||Zivic (USA)||bye|