A letterman, in U.S. sports, performing arts or academics, is a high school or college student who has met a specified level of participation or performance on a varsity athletic team, marching band, or in other performance school-sponsored activities.

The term comes from the practice of awarding each such participant a cloth "letter", which is usually the school's initial or initials, for placement on a "letter sweater" or "letter jacket" intended for the display of such an award. In some instances, the sweater or jacket itself may also be awarded, especially for the initial award to a given individual.

Today, in order to distinguish "lettermen" from other team participants, schools often establish a minimum level of participation in a team's events or a minimum level of performance in order for a letter to be awarded.

A common threshold in American football and basketball is participation in a set level, often half, of all quarters in a season.

In individual sports such as tennis and golf, the threshold for lettering is generally participation in one half or sometimes two-thirds of all matches contested. Frequently, other members of the team who fail to meet requirements for a letter are awarded a certificate of participation or other award considered to be of lesser value than a letter.

Sport (or, in the United States, sports) is all forms of competitive physical activity which, through casual or organised participation, aim to use, maintain or improve physical fitness and provide entertainment to participants. Hundreds of sports exist, from those requiring only two participants, through to those with hundreds of simultaneous participants, either in teams or competing as individuals.

Sport is generally recognised as activities which are based in physical athleticism or physical dexterity, with the largest major competitions such as the Olympic Games admitting only sports meeting this definition, and other organisations such as the Council of Europe using definitions precluding activities without a physical element from classification as sports. However, a number of competitive, but non-physical, activities claim recognition as mind sports. The International Olympic Committee (through ARISF) recognises both chess and bridge as bona fide sports, and SportAccord, the international sports federation association, recognises five non-physical sports, although limits the amount of mind games which can be admitted as sports.

Katherine "Kate" Upton (born June 10, 1992) is an American model and actress known for her appearances in the Sports Illustrated Swimsuit Issue, first in 2011, when she was named Rookie of the Year, and again in 2012, when she was announced as the cover model.

Upton was born in St. Joseph, Michigan and raised in Melbourne, Florida. She attended Holy Trinity Episcopal Academy. Her uncle is U.S. Representative Fred Upton, Republican of Michigan's 6th congressional district.

As a young equestrian, Upton showed at the American Paint Horse Association and competed on a national level. With her horse Roanie Pony, she won three APHA Reserve World Championships – 13 and Under Western Riding, 13 and Under Horsemanship, and 14–18 Western Riding. She was named the 13 and Under Reserve All-Around Champion, giving her a total of four reserve championships (2nd place). In addition, Upton ended up third overall on the APHA youth Top Twenty. With a second horse, Zipped, she won 14–18 Western Riding and was included in the top 5 in 14–18 Horsemanship and 14–18 Western Pleasure in 2009.

David Michael Letterman (born April 12, 1947) is an American television host and comedian. He hosts the late night television talk show, Late Show with David Letterman, broadcast on CBS. Letterman has been a fixture on late night television since the 1982 debut of Late Night with David Letterman on NBC. Letterman recently surpassed friend and mentor Johnny Carson for having the longest late-night hosting career in the United States of America.

Letterman is also a television and film producer. His company Worldwide Pants produces his show as well as its network follow-up The Late Late Show with Craig Ferguson. Worldwide Pants has also produced several prime-time comedies, the most successful of which was Everybody Loves Raymond, currently in syndication.

In 1996, David Letterman was ranked #45 on TV Guide's 50 Greatest TV Stars of All Time.

Letterman was born in Indianapolis, Indiana. His father, Harry Joseph Letterman (April 1915 – February 1973), was a florist of British descent; his mother Dorothy Letterman (née Hofert, now Dorothy Mengering), a Presbyterian church secretary of German descent, is an occasional figure on the show, usually at holidays and birthdays.

Marv Albert (born Marvin Philip Aufrichtig; June 12, 1941) is an American sportscaster. Honored for his work as a member of the Basketball Hall of Fame, he is commonly referred to as "the voice of basketball." From 1967–2004, he was also known as "the voice of the New York Knicks."

Including Super Bowl XLII, Marv has called the play-by-play of six Super Bowls, NBA Finals and seven Stanley Cup Finals. He has also called the Wimbledon Tennis Championships for TNT with Jim Courier and Mary Carillo. He also worked as a co-host and reporter for two World Series (1986 and 1988).

Albert currently works for TNT and CBS. He is TNT's lead NBA voice, calls NFL games for CBS, and also calls NCAA tournament action for CBS and Turner Sports.

Albert was born to a Jewish family in Brooklyn, where he went to Abraham Lincoln High School. While growing up, members of Albert's family owned a grocery store on Brighton Beach Avenue between 3rd and 4th streets known as Aufrichtig's. He then attended Syracuse University's Newhouse School of Public Communications from 1960 through 1963. He then graduated from New York University in 1965.