Contreras, 3-0 (2 KOs), was set to work with Justin Fortune as his strength and conditioning coach only for other commitments to get in the way. Then Contreras, trained by his father, Sam Contreras Snr, was contacted by Los Angeles-based boxing trainer Marvin Somodio about sparring Pacquiao for his comeback fight against WBC titleholder Mario Barrios. The 21-year-old Contreras stands just one inch shorter than Barrios at 5ft 11ins.
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