James Jackson Jeffries was an American professional boxer and world heavyweight champion.

Tommy Ryan was an American-Canadian World Welterweight and World Middleweight boxing champion who fought from 1887 to 1907. His simultaneously holding records in both weight classes was a rare and impressive feat for a boxer. His record is a topic that has been up for debate for decades. As of May 2021, Boxrec.com lists his official record as 82–2–13 (68KO). The International Boxing Hall of Fame lists his record as 86–3–6 (22KO). Others list his record anywhere from 86–3–6 (68KO), to 90–6–11 (70KO), to 84–2–11 (70KO). Some historians have even speculated that he held closer to 90 knockouts. Ryan was posthumously inducted into the International Boxing Hall of Fame in the class of 1991.