- Mar 1 Jerry Richardson Sr., American businessman and NFL team owner (Carolina Panthers 1995-2018), dies at 86
- Mar 1 Just Fontaine, French soccer striker (21 caps; USM Casablanca, Nice, Reims) and manager (France 1968–69, Paris Saint-Germain, Toulouse, Morocco), dies at 89
- Mar 2 Per Kristoffersen, Norwegian soccer forward (25 caps; Fredrikstad FC 194 games, 147 goals), dies at 85
- Mar 3 Jaak Lipso, Estonian basketball center (FIBA World C'ship gold 1967 USSR; Olympic silver 1964, bronze 1968; CSKA Moscow), dies at 82
- Mar 4 Christos Zanteroglou, Greek soccer defender (13 caps; Olympiacos, Egaleo), dies at 82
- Mar 5 Bob Goodman, American International Boxing HOF promoter (VP & Matchmaker Madison Square Garden 1985-94; Don King Productions; Garden State Boxing), dies at 83
- Mar 5 Dave Wills, American sportscaster (radio voice Tampa Bay Rays 2005-23 [with Andy Freed]), dies from heart disease at 58
- Mar 5 Klaus Bonsack, German luger (Olympic gold GDR men's doubles 1968, bronze 1972; silver singles 1964, bronze 1968; World C'ship gold 1967), dies at 81
- Mar 5 Shozo Sasahara, Japanese freestyle wrestler (World C'ship gold featherweight 1954; Olympic gold 1956), dies at 93
- Mar 6 Josef Vojta, Czech soccer midfielder (7 caps; AC Sparta Prague 351 games; Olympic silver 1964), dies at 87
- Mar 6 Pavel Kharin, Russian sprint canoeist (Olympic gold USSR C-2 10,000m, silver C-2 1,000m 1956), dies at 95
- Mar 7 Pat McCormick, American diver (4 x Olympic gold women's springboard & platform 1952, 56), dies at 92
- Mar 8 Gianmarco Calleri, Italian soccer entrepreneur (President SS Lazio 1986-92, Torino FC 1994-97), dies at 81
- Mar 8 Joe Pamensky, South African cricket administrator (president South African Cricket Union 1976-91), dies at 92
- Mar 9 Dave Nicoll, English motocross racer (Trans-AMA motocross series 1970) and official (FIM world championship Clerk of the Course 1997-2023), dies at 78
- Mar 9 Otis Taylor, American football wide receiver (Super Bowl IV Kansas City Chiefs; First-team All-Pro & Pro Bowl 1971, 72), dies from Parkinson's disease dementia at 80
- Mar 10 Jesús Alou, Dominican MLB baseball outfielder, 1963-79 (World Series 1973, 74 Oakland A's; Houston Astros, and 2 other teams), dies at 80
- Mar 10 Juvencio Osorio, Paraguayan soccer central midfielder (12 caps; RCD Español Barcelona, Cerro Porteño Asunción), dies at 72
- Mar 10 Kevin Freeman, American equestrian (Olympic silver team eventing 1964, 68, 72), dies at 81
- Mar 10 Niall Brophy, Irish rugby union wing (20 Tests Ireland, 2 British & Irish Lions; London Irish RFC, Barbarian FC, Leinster RFC), dies at 87
- Mar 11 Amy Fuller, American rower (World C'ship gold W 8+, 6 x silver; Olympic silver Coxless four 1992), dies from breast cancer at 54
- Mar 11 Harry "Bud" Grant, American Pro Football HOF coach (NFL Coach of the Year 1969 Minnesota Vikings; 4 x Grey Cup C'ship Winnipeg Blue Bombers) and basketball forward (NBA C'ship 1950 Minnesota Lakers), dies at 95 [1]
- Mar 12 Dick Fosbury, American athlete (Olympic gold high jump 1968, "Fosbury Flop"), dies of lymphoma at 76
- Mar 12 Susan Cunliffe-Lister [Lady Marsham of Ilton], British disability campaigner and paralympic athlete (longest-serving female member of UK House of Lords), dies at 87 [1]
- Mar 13 Glen Weir, Canadian Football Hall of Fame defensive lineman (Grey Cup 1974, 77 Montreal Alouettes; CFL All-Star 1975, 77), dies at 71
Joe Pepitone (1940-2023)
Mar 13 American baseball utility (3 x MLB All-Star; 3 x Gold Glove; World Series 1962 New York Yankees), dies at 82
- Mar 14 Jim Ferree, American golfer (1 x PGA Tour win; 2 x Senior PGA Tour wins), dies at 91
- Mar 15 Mimis Papaioannou, Greek soccer forward (61 caps; AEK Athens 480 games), dies at 80
- Mar 15 Roman Lentner, Polish soccer winger (33 caps; Górnik Zabrze SA 241 games), dies at 85
- Mar 19 Petar Nadoveza, Croatian soccer striker (1 cap; Yugoslavia; Hajduk Split 217 games) and manager (Hajduk Split 1982-84, 1988-89, 2000, 2004), dies at 80
- Mar 20 John Sattler, Australian rugby league prop (4 Tests; NSWRL Premiership 1967, 68, 70, 71 South Sydney), dies from dementia at 80
- Mar 20 Osvaldo Héctor Cruz, Argentine soccer forward (22 caps; Independiente 235 games), dies at 91
- Mar 21 Heinz Steinmann, German soccer defender (3 caps West Germany; Schwarz-Weiß Essen, 1. FC Saarbrücken, Werder Bremen), dies at 85
- Mar 21 Willie Bell, Scottish soccer defender (2 caps; Queen's Park FC, Leeds United, Leicester City, Brighton & HA) and manager (Birmingham City, Lincoln City, Liberty Flames), dies at 85
Willis Reed (1942-2023)
Mar 21 American Basketball HOF center (NBA C'ship 1970 [MVP], 1973 [MVP]; NBA MVP 1970; 7 × NBA All-Star; NY Knicks) and coach (NY Knicks, NJ Nets), dies from heart failure at 80
- Mar 22 Tony Knapp, English soccer manager (Iceland, Viking FK) and defender (Leicester City, Southampton), dies at 86
- Mar 23 Frank LeMaster, American football linebacker (Pro Bowl 1981 Philadelphia Eagles; SF 49ers), dies at 71
- Mar 23 Peter Marti, Swiss soccer striker (6 caps; BSC Young Boys, FC Zürich, FC Basel, FC Aarau), dies at 70
- Mar 25 Hans Richter, German soccer forward (15 caps GDR; FC Karl-Marx-Stadt, 1. FC Lokomotive Leipzig), dies at 63
- Mar 26 Juan Carlos Murúa, Argentine soccer defender (10 caps; Racing Club de Avellaneda, AA Argentinos Juniors, CA Platense), dies at 87
- Mar 26 Rick Lantz, American football coach (World Bowl XII 2004 Berlin Thunder; NFL Europe Coach of the Year 2004), dies at 85
- Mar 28 Bill Leavy, American football official (NFL 1995-2014; Super Bowl 2000, 06; 15 x playoff games), dies at 76
- Mar 28 Manfred Schaefer, Australian soccer defender (49 caps; St. George-Budapest FC) and manager (St. George-B FC, Sydney Olympic FC, APIA Leichhardt, Sydney Utd, Marconi), dies at 80
- Mar 31 John Brockington, American football running back (First-team All-Pro 1971, 73; Pro Bowl 1971, 72, 73; Green Bay Packers, Kansas City Chiefs), dies at 74
Baseball Players
Basketball Stars
Boxers
Footballers
NFL Stars
Tennis Champions