John Joseph Havlicek was an American professional basketball player who spent his entire career with the Boston Celtics of the National Basketball Association (NBA).

The Boston Celtics are an American professional basketball team based in Boston. The Celtics compete in the National Basketball Association (NBA) as a member of the Atlantic Division of the Eastern Conference. Founded in 1946 as one of the league's original eight teams, the Celtics play their home games at TD Garden, which is also the home of the National Hockey League's Boston Bruins. The Celtics are regarded as one of the most successful teams in NBA history and are tied with the Los Angeles Lakers for the most NBA championships with 17. The Celtics currently hold the record for the most recorded wins of any NBA team.