A triathlon is a multi-sport event involving the completion of three continuous and sequential endurance events. While many variations of the sport exist, triathlon, in its most popular form, involves swimming, cycling, and running in immediate succession over various distances. Triathletes compete for fastest overall course completion time, including timed "transitions" between the individual swim, bike, and run components. The word "triathlon" is of Greek origin from τρεις or trei (three) and αθλος or athlos (contest).

Triathlon races vary in distance. According to the International Triathlon Union, and USA Triathlon, the main international race distances are Sprint distance (750 metres (0.47 mi) swim, 20 kilometres (12 mi) bike, 5 kilometres (3.1 mi) run), Intermediate (or Standard) distance, commonly referred to as "Olympic distance" (1.5 kilometres (0.93 mi) swim, 40 kilometres (25 mi) ride, 10 kilometres (6.2 mi) run), the Long Course (1.9 kilometres (1.2 mi) swim, 90 kilometres (56 mi) ride, 21.1 kilometres (13.1 mi) run, such as the Half Ironman), and Ultra Distance (3.8 kilometres (2.4 mi) swim, 180 kilometres (110 mi) ride, and a marathon: 42.2 kilometres (26.2 mi) run); the most recognized branded Ultra Distance is the Ironman triathlon.

Pete Edward Jacobs (May 7, 1899, Asbury Park, New Jersey - ca. 1952) was an American jazz drummer.

Jacobs played in the Musical Aces, then joined the band of Claude Hopkins from 1926 to 1928. He left Hopkins to play with Charlie Skeete in 1928, then returned to play with Hopkins from 1928 until 1938. During this ten-year tenure in Hopkins's orchestra, Jacobs recorded extensively with the group on Brunswick Records, particularly during the period 1932 to 1927. Additionally, he appeared with the band in the short films Barbershop Blues (1933) and By Request (1936).

Jacobs fell ill in 1938 and had to quit the group, and never returned to active performance.