<|im_start|>user
Who was boxer John Baldwin

Context:
Known as "The Mad" Baldwin, he turned pro in 1970 and lost a decision to Marvin Hagler in 1975. In 1977 he took on Rocky Mosley Jr in the ill-fated U.S. Championship Tournament, but lost via K.O. In 1978 he lost a decision to Marvin Johnson, and retired a year later.<|im_end|>
<|im_start|>assistant
Born in Detroit, John Baldwin was a professional US boxer.  He fought in the Light-Middleweight category and won a bronze medal in the 1968 Olympics.   He turned pro in 1970, and lost a decision to Marvin Hagler in 1975.  He retired in 1979<|im_end|>
