Before he became famous, which of these singers was a successful amateur boxer?

William Martin Joel (born May 9, 1949) is an American singer, pianist and songwriter. Commonly nicknamed the "Piano Man" after his signature song of the same name, he has led a commercially successful career as a solo artist since the 1970s, having released 12 pop and rock studio albums from 1971 to 1993 as well as one studio album of classical compositions in 2001. He is one of the best-selling music artists of all time, as well as the seventh-best-selling recording artist and the fourth-best-selling solo artist in the United States, with over 160 million records sold worldwide.

Joel was born in the Bronx, New York. He reluctantly began piano lessons at age four at his mother's insistence. His teachers included the noted American pianist Morton Estrin and musician Timothy Ford. Joel says that he is a better organist than pianist. As a teenager, Joel took up boxing so he could defend himself. He boxed successfully on the amateur Golden Gloves circuit for a short time, winning 22 bouts, but abandoned the sport shortly after his nose was broken in his 24th boxing match.