Placekicker, or simply kicker (PK or K), is the title of the player in American and Canadian football who is responsible for the kicking duties of field goals, extra points. In many cases, the placekicker also serves as the team's kickoff specialist (KOS) or, more rarely, punter (P), as well.

The kicker initially was not a specialized role. Until the 1960s, the kicker was almost always doubled at another position on the roster, George Blanda, Frank Gifford and Paul Hornung being some of the more prominent examples of players who were stars at other positions as well as being known for their kicking abilities. As the era of "two-way" players gave way to increased specialization, teams would employ a specialist at the punter or kicker position. Because of the difference in techniques needed, to avoid leg fatigue, and to reduce the risk of injury, on the professional level most teams employ separate players to handle the jobs. The placekicker usually will only punt when the punter is injured, and vice-versa. (One player often handles both jobs in the Canadian Football League, which has smaller active rosters than in the NFL.) A professional team will occasionally even have a "kickoff specialist" who handles only the kickoffs and serves as a backup to the kicker who handles field goals and extra points. This is typically done to further protect a premier point-scoring kicker from injury or if he, while accurate, does not have sufficient distance on kickoffs.

A football player or footballer is a sportsperson who plays one of the different types of football. The main types of football that are played are association football, American football, Canadian football, Australian rules football, Gaelic football, Rugby league, and Rugby union.

It has been estimated that there are 250 million association football players in the world, and many play the other forms of football.

Football players generally begin as amateurs and the best players progress to become professional players. Normally they start at a youth team (any local team) and from there, based on skill and talent, scouts offer contracts. Once signed, they learn to play better football and some advance to the senior or professional teams.

Research shows that association football players that take less than 200ms after the referee blows their whistle for a penalty kick are significantly more likely to miss scoring than those that take over a second.

American football players are prone to head injuries. This may make them prone to Alzheimers.

Thomas Jacob "Jack" Black (born August 28, 1969) is an American comedian, actor and musician. He makes up one half of the comedy and satirical rock duo Tenacious D. The group has three albums as well as a television series and a film. His acting career is extensive, starring primarily as bumbling, cocky, but internally self-conscious outsiders in comedy films. He was a member of the Frat Pack, a group of comedians who have appeared together in several Hollywood films, and has been nominated for a Golden Globe award. He has also won an MTV Movie Award, and a Nickelodeon Kids Choice Award as well as hosting the 2006, 2008, and 2011 Kids Choice Awards.

Black was born in Santa Monica, California, the son of two satellite engineers, Judith (née Cohen), who worked on the Hubble Space Telescope, and Thomas William Black. His mother is Jewish and his father converted to Judaism (Black attended Hebrew school). On The Tonight Show, he said his surname may have come from the occupational name Blacksmith. Black's parents divorced when he was 10; Black moved to Culver City with his father and frequently visited his mother’s home. As a child, Black appeared in a commercial for the Activision game Pitfall! in 1982, which was later shown during an appearance on Jimmy Kimmel Live and again on The Tonight Show with Conan O' Brien. When Black entered high school, his parents enrolled him at the Poseidon School, a private secondary school engineered specifically for students struggling in the traditional school system. Black also attended the Crossroads School, where he excelled in drama. He later attended UCLA but dropped out during his sophomore year to pursue a career in entertainment, at which point his father discontinued his financial support.^{[citation needed]} Fellow UCLA alumnus Tim Robbins later cast Black in Bob Roberts. He also had recurring roles on the HBO sketch comedy series Mr. Show.