Competition number

[3][4] In addition to identifying an athlete, many high profile events also imprint sponsor logos.

In racewalking events, competitors also must wear numbers on their backs for identification by the judges after a violation has been detected.

[6] In some types of motorsport, such as rallys, competition numbers are attached to the vehicles taking part in a specific event.

Some notable exceptions include: At the 2019 Boston Marathon, organizers gave special bib numbers to several celebrities.

Former NFL player Tedy Bruschi was given 5454, his uniform number repeated; NASCAR driver Jimmie Johnson was given 4848, his car number with Hendrick Motorsports repeated; and Joan Benoit Samuelson was given 1979, the year of her first win in the event.