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Jack O'Boyle was the name under which promoter Jake Mintz fought.

Reference sources

• Jake Mintz dead of a heart attack. Eugene (Ore.) Register-Guard, June 9, 1957, page 3B

• Myron Cope, "Kind hearts and cauliflowers" Sports Illustrated, October 19, 1964

• "Jake of Hearts: Matchmaker tough to match". Corning (NY) Leader, May 15, 1944