He may not be a household name like some of the other boxers on this list, but Steve Ward was recognized for being the world’s oldest professional boxer by the Guinness Book of World Records on two separate occasions. Ward was first named the world’s oldest boxer in 2011 at the age of 54, but briefly lost it in 2015. Later that year, Ward (who was 59 at the time) regained the title in a fight against Jody Meilke, a boxer 24 years his junior. Ward finally retired in 2017 when he was about 61 years old.