Baseball and cricket •
Jim Clark (infielder) (1927–1990), American baseball infielder •
Jim Clark (1910s outfielder) (1887–1969), American baseball outfielder •
Jim Clark (1970s outfielder) (1947–2019), American baseball outfielder •
James Clark (Australian cricketer) (1871–1941), Australian cricketer •
James Clark (New Zealand cricketer) (1910–2003), New Zealand cricketer known as Bernie Clark •
James Clark Baker (1866–1939), New Zealand cricketer known as James Clark for some of his life
Football and rugby •
James Clark (American football) (1904–1977), American football player •
Jim Clark (offensive lineman) (1929–2000), American football player •
Jim Clark (American football coach) (born, c. 1926), American football coach •
Jim Clark (Australian footballer) (1925–2013), in the Victorian Football League •
Jimmy Clark (footballer, born 1913) (1913–?), Scottish professional footballer •
Jim Clark (Scottish footballer) (1923–1994), Scottish footballer •
Jamie Clark (footballer) (born 1976), Scottish soccer coach and former footballer •
Jimmy Clark (rugby union) (1908–1979), Australian national rugby union team captain •
Jim Clark (rugby league) (fl. 1913–1927), a New Zealand rugby league player •
Jamie Clark (rugby league) (born 1987), English rugby league player •
James Clark (footballer, born 2001), English footballer
Other sports •
Jimmy Clark (boxer) (1914–1994), American Olympic boxer •
Jimmy Clark (golfer) (1920–2010), American professional golfer •
James Clark (sport shooter) (born 1936), American Olympic shooter •
Jim Clark (1936–1968), Scottish Formula one world drivers' champion in the 1960s •
Jim Clark (rower) (born 1950), British rower •
James Clark (shinty) (born 1973), shinty player from Invergarry, Scotland •
James Clark (water polo) (born 1991), Australian water polo goalkeeper •
James Clark (athlete), marathon runner •
Jim Clark (ice hockey) (born 1954), director of scouting for the Ottawa Senators ==Other==