- LA Galaxy (Football)
- LA Galaxy II (Football)
- LA Giltinis (Rugby Union)
- La Rochelle (Rugby Union)
- Labrador (Australian Rules Football)
- Laci (Football)
- Lafayette University (American Football)
- Lahore Qalandars (Cricket)
- Lahore Region Blues (Cricket)
- Lahore Region Whites (Cricket)
- Lamar University (American Football)
- Lambton Jaffas FC (Football)
- Lamia (Football)
- Lamont Roach (Boxing)
- Lancashire (Cricket)
- Lancashire (Hurling)
- Lancashire 2nd XI (Cricket)
- Lancashire Thunder (Cricket)
- Lancashire Women (Cricket)
- Landskrona BoIS (Football)
- Lani Daniels (Boxing)
- Länk FC Vilaverdense (Football)
- Lankan Cricket Club (Cricket)
- Lantau Cricket Club Women (Cricket)
- Laois (Hurling)
- Laois (Gaelic Football)
- Laos (Football)
- Larissa (Football)
- Larkana Region (Cricket)
- Larne (Football)
- Las Palmas (Football)
- Las Vegas Aces (Basketball)
- Las Vegas Raiders (American Football)
- Laszlo Toth (Boxing)
- Latham XI (Cricket)
- Latvia (Football)
- Latvia (Ice Hockey)
- Latvia (Tennis)
- Latvia (Basketball)
- Latvia U21 (Football)
- Latvia Women (Football)
- Latvia Women (Lacrosse)
- Lauren Price (Boxing)
- Lawrence Okolie (Boxing)
- Lazio (Football)
- LDLC ASVEL Féminin (Basketball)
- LDU Quito (Football)
- Le Havre (Football)
- Leafield Athletic Ladies FC (Football)
- Leamington Lions Ladies (Football)
- Lebanon (Tennis)
- Lebanon (Football)
- Lebanon (Rugby League)
- Lebanon (Basketball)
- Lecce (Football)
- Lech Poznan (Football)
- Lechia Gdansk (Football)
- Lee Appleyard (Boxing)
- Lee Haskins (Boxing)
- Lee Selby (Boxing)
- Leeds Modernians Women (Football)
- Leeds Rhinos (Rugby League)
- Leeds Rhinos (Netball)
- Leeds Rhinos (Disability Sports)
- Leeds Rhinos Women (Rugby League)
- Leeds United (Football)
- Leeds United U21 (Football)
- Leeds United Women (Football)
- Leek Town Ladies (Football)
- Leeward Islands (Cricket)
- Leeward Islands Women (Cricket)
- Leganes (Football)
- Legends of Rupganj (Cricket)
- Legia Warsaw (Football)
- Lehigh (Basketball)
- Lehigh (American Football)
- Leicester City (Football)
- Leicester City U21 (Football)
- Leicester City Women (Football)
- Leicester City Women Development (Football)
- Leicester Riders (Basketball)
- Leicester Riders Women (Basketball)
- Leicester Tigers (Rugby Union)
- Leicester Tigers Women (Rugby Union)
- Leicestershire (Cricket)
- Leicestershire 2nd XI (Cricket)
- Leicestershire Women (Cricket)
- Leigh Leopards (Rugby League)
- Leigh Leopards Women (Rugby League)
- Leigh Wood (Boxing)
- Leinster Lightning (Cricket)
- Leinster Rugby (Rugby Union)
- Leitrim (Hurling)
- Leitrim (Gaelic Football)
- Leixões SC (Football)
- Lenin Castillo (Boxing)
- Lennox Clarke (Boxing)
- Leo Santa Cruz (Boxing)
- Leonardo Baez (Boxing)
- Lerrone Richards (Boxing)
- Lesotho (Football)
- Levadiakos (Football)
- Levante (Football)
- Levski Sofia (Football)
- Lewes Women (Football)
- Lewis Crocker (Boxing)
- Lewis Ritson (Boxing)
- Leyton Orient (Football)
- Leyton Orient WFC (Football)
- LG Twins (Baseball)
- Liam Cameron (Boxing)
- Liam Conroy (Boxing)
- Liam Davies (Boxing)
- Liam Dillon (Boxing)
- Liam Harrison (Boxing)
- Liam Paro (Boxing)
- Liam Smith (Boxing)
- Liam Williams (Boxing)
- Liam Wilson (Boxing)
- Liberia (Football)
- Libertad (Football)
- Liberty (Basketball)
- Liberty (American Football)
- Libya (Football)
- Libya (Volleyball)
- Lichfield City Ladies (Football)
- Liechtenstein (Football)
- Liechtenstein U21 (Football)
- Liechtenstein Women (Football)
- Lierse SK (Football)
- Liga MX All-Stars (Football)
- Lightning (Netball)
- Lightning (Cricket)
- Lille (Football)
- Lillestrøm (Football)
- Lillestrøm Women (Football)
- Limerick (Hurling)
- Limerick (Gaelic Football)
- Limpopo (Cricket)
- Limpopo Women (Cricket)
- Lincoln City (Football)
- Lincoln Red Imps (Football)
- Lincoln United Ladies (Football)
- Lincolnshire (Cricket)
- Lincolnshire Women (Cricket)
- Lindenwood (American Football)
- Linfield (Football)
- Linlithgow Rose (Football)
- Linlithgow Rose Ladies (Football)
- Linz ASK (Football)
- Lions (Rugby Union)
- Lions (Cricket)
- Lions (Pakistan) (Cricket)
- Lions (Zimbabwe) (Cricket)
- Lions Women (Cricket)
- Lions XI (Cricket)
- Lipscomb (Basketball)
- Liskeard Athletic Women (Football)
- Lithuania (Football)
- Lithuania (Tennis)
- Lithuania (Basketball)
- Lithuania U21 (Football)
- Lithuania Women (Football)
- Lithuania Women (Basketball)
- Littlehampton Town (Football)
- LIU Sharks (American Football)
- Liverpool (Football)
- Liverpool Feds W.F.C. (Football)
- Liverpool U21 (Football)
- Liverpool Women (Football)
- Livingston (Football)
- Livingstone Women (Football)
- Llanelli (Rugby Union)
- Lochee United (Football)
- Logan Paul (Boxing)
- Lokomotiv Moscow (Football)
- Lokomotiv Plovdiv (Football)
- Lokomotiva Zagreb (Football)
- Lokomotivi Tbilisi (Football)
- London (Hurling)
- London Bees (Football)
- London Broncos (Rugby League)
- London Broncos Women (Rugby League)
- London City Lionesses (Football)
- London Irish (Rugby Union)
- London Lions (Basketball)
- London Lions Women (Basketball)
- London Mavericks (Netball)
- London Pulse (Netball)
- London Scottish (Rugby Union)
- London Seaward Women (Football)
- London Spirit (Cricket)
- Long Beach State (Basketball)
- Long Eaton United Ladies (Football)
- Long Itchington Women (Football)
- Long-Lions (Basketball)
- Longford (Hurling)
- Longford (Gaelic Football)
- Longwood (Basketball)
- Lorient (Football)
- Los Angeles Angels (Baseball)
- Los Angeles Chargers (American Football)
- Los Angeles Clippers (Basketball)
- Los Angeles Dodgers (Baseball)
- Los Angeles Football Club (Football)
- Los Angeles Golf Club (Golf)
- Los Angeles Kings (Ice Hockey)
- Los Angeles Knight Riders (Cricket)
- Los Angeles Lakers (Basketball)
- Los Angeles Rams (American Football)
- Los Angeles Sparks (Basketball)
- Lossiemouth (Football)
- Lothian Thistle (Football)
- Loughborough Foxes WFC (Football)
- Loughborough Lightning (Cricket)
- Loughborough Lightning (Netball)
- Loughborough Lightning (Rugby Union)
- Loughborough Lightning Women (Football)
- Louis Greene (Boxing)
- Louisiana (American Football)
- Louisiana Monroe (American Football)
- Louisiana Tech (American Football)
- Louisville (American Football)
- Louisville (Basketball)
- Louisville City FC (Football)
- Louth (Hurling)
- Louth (Gaelic Football)
- Loyola Chicago (Basketball)
- LSK Kvinner (Football)
- LSU (Basketball)
- LSU (American Football)
- Lucknow Super Giants (Cricket)
- Ludogorets (Football)
- Luis Alberto Lopez (Boxing)
- Luis Alcarez Pineda (Boxing)
- Luis Concepcion (Boxing)
- Luis Nery (Boxing)
- Luis Ortiz (Boxing)
- Lukasz Rozanski (Boxing)
- Luke Campbell (Boxing)
- Luncarty (Football)
- Lusitano de Évora (Football)
- Luton Town (Football)
- Luton Town Ladies (Football)
- Luxembourg (Football)
- Luxembourg (Tennis)
- Luxembourg U21 (Football)
- Luxembourg Women (Football)
- Luzern (Football)
- Lyca Kovai Kings (Cricket)
- Lye Town Ladies FC (Football)
- Lyndon Arthur (Boxing)
- Lyngby Boldklub (Football)
- Lyon (Football)
- Lyon (Rugby Union)
- Lyon Féminin (Football)