John Ruiz, the only heavyweight champion of Latino descent, is retiring.
The 38-year-old American boxer said yesterday he's leaving after an 18-year career.
He was the WBA champ twice and finished with a record of 44-9-1, including 30 knockouts.
Ruiz was knocked down four times in a loss to David Haye this month.
He hit the canvas twice in the first round, and his trainer ended the fight in the ninth.
Boxing: Ruiz calls time in ring
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