- Mar 3 Alexander Semin, Russian ice hockey player
- Mar 4 Kevin O'Brien, Irish cricket batsman (3 Tests; 142 ODIs; 89 T20I; fastest century ever in ODI World Cup, off 50 balls v England 2011), born in Dublin, Ireland
- Mar 7 Mathieu Flamini, French footballer (Arsenal), born in Marseille, France
- Mar 9 Julia Mancuso, American Alpine skier (4 Olympic gold medals), born in Reno, Nevada
- Mar 13 Marc Zwiebler, German badminton player, born in Bonn, Germany
- Mar 13 Pieter Custers, Dutch athlete, born in Weert, Netherlands
- Mar 15 Kostas Vassiliadis, Greek basketball player
- Mar 16 Levi Brown, American football player
- Mar 20 Fernando Torres, Spanish footballer
- Mar 20 Marcus Vick, American football player
- Mar 20 Markus Niemelä, Finnish racing driver
- Mar 20 Valtteri Filppula, Finnish NHL hockey player, 2005-21 (Detroit Red Wings, Tampa Bay Lightning, and 2 other teams), born in Vantaa, Finland
- Mar 21 Franck Perera, French racing car driver, born in Montpellier, France
- Mar 24 Chris Bosh, American basketball player
- Mar 28 Christopher Samba, French-born footballer
- Mar 28 Yordanos Abay, Ethiopian footballer
- Mar 30 Mario Ančić, Croatian tennis player (world #7 2006; Davis Cup 2005), born in Split, Croatia
- Mar 30 Samantha Stosur, Australian tennis player (US Open singles 2011; 9 x Grand Slam doubles titles; Tour Finals doubles 2005, 06), born in Brisbane, Australia
- Mar 31 Eddie Johnson, American soccer striker (63 caps; FC Dallas, Seattle Sounders), born in Bunnell, Florida
- Mar 31 James Jones, American NFL receiver (NFL receiving TD leader 2012), born in San Jose, CA
About March 1984
How Old? 40 years old
Generation: Millennial
Leap Year: Yes
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions