[2] Notably, he fought through his entire career with a metal plate in his right arm – limiting his range of motion to 5 to 7 inches – an injury he sustained when, as a ten-year-old boy, he dove off a two-story shanty roof in his Lower Hill District neighborhood - and a dead or dying right kidney.

[3] In April 1950, at Duquesne Gardens in Pittsburgh, Zivic was ahead in a fight with Laurent Dauthuille, in the elimination bout for a title shot with Jake LaMotta.

After getting knocked down in the ninth round, Zivic was on his feet taking the mandatory standing eight count, when Dauthuille moved out of his neutral corner and pounced on him for the kill at 1:15.

He was taken to the nearby Mercy Hospital where X-rays revealed that he had a dead right kidney that dated back to 1944, the same year that he began his boxing career.

When Fritzie lacked the adequate time to devote to Zivic's career, he sold his contract to Billy Sarkis and Hymie Schwartz, also of Pittsburgh.