Boxing: Ruiz calls time in ring

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.