Lawrence Donald Casey (born June 17, 1937) is an American former professional and collegiate basketball coach. He has coached two National Basketball Association (NBA) teams, the Los Angeles Clippers and the New Jersey Nets—each for a season and a half. He had previously coached the Temple Owls from 1973 to 1982. He also worked as an assistant coach with the Chicago Bulls (1982–83) and Boston Celtics (1990–1996).