American football •
Mike Smith (American football coach) (born 1959), former head coach of the NFL Atlanta Falcons •
Mike Smith (linebacker) (born 1981), former NFL linebacker, current coach for the NFL Minnesota Vikings •
Michael Smith (running back) (born 1988), American football running back who is currently a free agent •
Michael Smith (American football coach), American football coach in the United States •
Mike Smith (wide receiver) (born 1958), former NFL wide receiver •
Michael Smith (wide receiver) (born 1970), former NFL wide receiver
Association football •
Mike Smith (footballer, born 1935) (1935–2013), English defender •
Mike Smith (football manager) (1937–2021), English football manager •
Mick Smith (footballer) (born 1958), English defender •
Michael Smith (footballer, born 1988), Northern Irish defender •
Michael Smith (footballer, born 1991), English forward
Baseball •
Mike Smith (1890s outfielder) (1868–1945), MLB outfielder from 1886 to 1901 •
Mike Smith (1920s outfielder) (1904–1981), MLB outfielder who played in the 1926 season •
Mike Smith (pitcher, born 1961), National League pitcher from 1984 to 1989 •
Mike Smith (pitcher, born 1963), American League pitcher from 1989 to 1990 •
Mike Smith (infielder) (born 1969), Rotary Smith Award winner •
Mike Smith (2000s pitcher) (born 1977), MLB pitcher in the 2000s
Basketball •
Mike Smith (basketball, born 1963), former professional basketball player from the University of South Carolina-Spartanburg •
Michael Smith (basketball, born 1965), former BYU and Boston Celtics player, and former Los Angeles Clippers television and radio commentator •
Michael Smith (basketball, born 1972), former NBA player from Washington, D.C. •
Mike Smith (basketball, born 1976), professional basketball player from West Monroe, Louisiana •
Mike Smith (basketball, born 1987), professional basketball player from East Tennessee State University •
Mike Smith (basketball, born 1997), college basketball player for the Michigan Wolverines
Cricket •
M. J. K. Smith (born 1933), English cricketer and rugby union player •
Michael J. Smith (cricketer) (1942–2004), cricketer who played for Middlesex CCC and England •
Mike Smith (Australian cricketer) (born 1973), Australian cricketer •
Mike Smith (Scottish cricketer) (1966–2026), Scottish cricketer •
Mike Smith (cricketer, born 1967), Gloucestershire CCC and England cricketer •
Michael Smith (Oxfordshire cricketer) (1928–2018), English cricketer •
Michael Smith (South African cricketer) (born 1980), South African cricketer
Other sports •
Michael Smith (Australian footballer) (born 1959), Australian rules footballer •
Michael Smith (rugby league, born c. 1947), in the 1960s, and 1970s for Featherstone Rovers and Huddersfield •
Mike Smith (rugby league), in the 1970s, and 1980s for Great Britain and Hull Kingston Rovers •
Michael Smith (rugby league, born 1976), in the 1990s and 2000s for North Harbour, New Zealand, Canterbury Bulldogs •
Michael Smith (rugby union) (born 1998), Canadian rugby union player •
Mike Smith (rugby union) (born 1945), Scottish rugby union player •
Michael Smith (ice hockey) (born 1971), Canadian ice hockey defenseman •
Mike Smith (ice hockey, born 1945), general manager for Winnipeg Jets and Chicago Blackhawks •
Mike Smith (ice hockey, born 1982), Canadian goaltender for the Edmonton Oilers •
Michael Smith (wrestler) (born 1963), American professional wrestler •
Mike E. Smith (born 1965), American jockey •
Mike Smith (decathlete) (born 1967), Canadian decathlete •
Michael Smith (darts player) (born 1990), English darts player •
Michael Smith (canoeist), British slalom canoeist •
Mike Smith (softball), head coach of the California Baptist Lancers softball team •
Mike Smith (running coach) (born 1980), cross country and track and field coach for the Northern Arizona Lumberjacks •
Mike Smith (skateboarder), American skateboarder •
Mike Smith (tennis) (born 1962), American tennis player •
Michael Smith (sprinter), winner of the 2002
4 × 400 meter relay at the NCAA Division I Indoor Track and Field Championships ==Others==