| Athlete | Country | Sports | Date of birth |
|---|---|---|---|
| Wilmar Madrid | SHO | 23 January 1997 | |
| Esteffanie Madrigal | DIV | 28 October 2002 | |
| Juan Madrigales | BBL | 6 June 1992 | |
| Isabella Maegli | SAI | 16 August 1989 | |
| Gabriel Maestre | BOX | 22 September 1986 | |
| Lucía Magallanes | VOL | 9 January 1998 | |
| Carlos Mahecha | SWI | 10 October 1992 | |
| María Mailliard | CAN/OWS | 24 January 1991 | |
| Christian Makoun | FTB | 5 March 2000 | |
| Gabriela Malave | FTB | 8 March 2001 | |
| Alejandro Maldonado | KTE | 25 July 2000 | |
| Allan Maldonado | KTE | 22 May 1994 | |
| Tania Maldonado | ARC | 16 March 1991 | |
| Bastian Malla | TEN | 22 September 1996 | |
| Thalía Mallquí | WRE | 11 May 1987 | |
| José Manama | GYM | 25 January 1992 | |
| Jorge Manjarrés | BVO | 27 November 1988 | |
| Carmen Mansilla | ATH | 28 November 1990 | |
| William Mantilla | TEN | 10 May 1993 | |
| César Marcano | CYC | 22 October 1987 | |
| Freymar Marcano | TKW | 15 November 1994 | |
| Santiago Marcano | TMP | 28 November 1988 | |
| Francesco Marcantonio | SQU | 13 February 1998 | |
| Vicente Mardones | VOL | 18 December 1999 | |
| María Alejandra Marín | VOL | 4 November 1995 | |
| Carmen Márquez | SWI | 16 July 1999 | |
| Dayron Márquez | ATH | 11 June 1983 | |
| María José Marrero | SHO | 18 March 1998 | |
| Aníbal Marroquín | BDM | 7 December 1992 | |
| Juan Martín Ortiz | RGB/RUG | 16 October 1989 | |
| Alejandro Martín | ARC | 30 September 1993 | |
| Alexander Martínez | JUD | 25 February 1995 | |
| Andrés Martínez | GYM | 3 April 1997 | |
| Brayelín Martínez | VOL | 11 September 1996 | |
| Carmen Martínez | ATH | 26 December 1982 | |
| Clever Martínez | CYC | 27 November 1990 | |
| Emelys Martínez | VOL | 8 May 2000 | |
| Esmery Martínez | BK3/BAS | 1 May 2000 | |
| Etilso Martínez | FTB | 12 May 2000 | |
| Gabriela Martínez | RQL | 2 August 1999 | |
| Héctor Martínez | BAS | 5 May 1999 | |
| Jhoana Martínez | ATH | 9 September 1986 | |
| Jhon Martínez | BOX | 17 August 1991 | |
| Jineiry Martínez | VOL | 3 December 1997 | |
| Johana Martínez | SBL | 21 July 1985 | |
| Jonnathan Martínez | BAS | 1 August 1999 | |
| Jovanni Martínez | KTE | 25 April 1990 | |
| Juan Martínez | WRE | 12 June 1991 | |
| Larysmer Martínez | VOL | 18 October 1996 | |
| Leticia Martínez | BHA/HAN | 21 December 1988 | |
| Mabel Martínez | BAS | 28 October 1986 | |
| María Martínez | FEN | 3 January 1983 | |
| Matías Martínez | SHO | 11 January 1999 | |
| Michelle Martínez | BDM | 3 October 1997 | |
| Natalia Martínez | VOL | 25 November 2000 | |
| Ronald Martínez | VOL | 11 July 1998 | |
| Valentina Martínez | ROW | 3 May 2000 | |
| Yuberjén Martínez | BOX | 1 November 1991 | |
| Andrea Masias | RUG | 22 November 1993 | |
| Frank Mata | BBL | 11 March 1984 | |
| Paola Mata | HAN | 7 August 1993 | |
| Matheo Mateos | SWI | 10 November 2000 | |
| Rodrigo Matos | BAS | 24 March 2000 | |
| Jazmine Matta | SHO | 3 April 1999 | |
| Kenny Matta | SHO | 6 November 1994 | |
| Sergio Mattey | JUD | 20 June 1989 | |
| Armando Matute | TRI | 31 August 1994 | |
| Paola Mautino | ATH | 1 June 1990 | |
| Julio Mayora | WLT | 2 September 1996 | |
| Olga Mazo | SBL | 6 June 1990 | |
| Javier McFarlane | ATH | 21 October 1991 | |
| Jorge McFarlane | ATH | 20 February 1988 | |
| Chelsa McLean | SBL | 20 October 1989 | |
| Héctor Medina | BAS | 10 April 1998 | |
| Jorge Medina | WRE | 9 January 1995 | |
| Khaterinne Medina | RUG | 31 October 1992 | |
| Marcelo Medina | ROW | 9 April 1997 | |
| Paula Medina | TTN | 12 April 1989 | |
| Stefanny Medina | KTE | 25 November 1990 | |
| Yailyn Medina | FTB | 27 January 1998 | |
| Laura Mejía | RUG | 9 August 2000 | |
| Leandro Mejía | VOL | 8 November 1996 | |
| Miguel Mejía | SHO | 29 September 1993 | |
| Robert Mejia | FTB | 6 October 2000 | |
| Sebastián Mejía | RUG | 30 September 1989 | |
| Pedro Mejías | WRE | 18 December 1991 | |
| Inés Melchor | ATH | 30 August 1986 | |
| Wililam Meléndez | JUD | 7 September 1990 | |
| Daniel Melo | FTB | 25 April 2001 | |
| Laura Melo | SWI | 11 June 2002 | |
| Ana Karina Méndez | GYM | 3 February 1999 | |
| Daniela Méndez | TKW | 3 November 1999 | |
| Mayra Méndez | ARC | 25 June 1993 | |
| Mayra Méndez | RUG | 21 June 1998 | |
| Yulissa Mendieta | SBL | 17 May 1996 | |
| Alonzo Mendoza | VOL | 11 May 1995 | |
| Ana Mendoza | ARC | 26 September 1990 | |
| Anyelo Mendoza | SWI | 8 October 1999 | |
| Johandryn Mendoza | BAS | 9 November 1998 | |
| Julio Mendoza | EQU | 8 April 1979 | |
| Miyareth Mendoza | WLT | 6 April 1994 | |
| Yeiker Mendoza | ATH | 17 March 1995 | |
| Lucia Menéndez | SHO | 16 March 1986 | |
| Cristal Meneses | TTN | 16 September 1994 | |
| Saida Meneses | ATH | 25 October 1997 | |
| Yadir Meneses | FTB | 1 April 2000 | |
| Cindy Mera | JUD | 16 September 2000 | |
| Jordan Mercado | FTS | 12 November 1994 | |
| Mario Mercado | RQL | 15 January 1995 | |
| Jhonny Merdano | BBL | 12 September 1987 | |
| José Merlin | JUD | 24 January 1992 | |
| Alberto Mestre | SWI | 10 February 1999 | |
| Francisco Metuaze | RUG | 19 December 1988 | |
| Dario Meza | FTS | 13 December 1984 | |
| Luis Fernando Meza | VOL | 30 January 1997 | |
| Joice Micolta | ATH | 14 October 1998 | |
| Santiago Micolta | FTB | 26 May 2000 | |
| Aixa Middleton | ATH | 6 February 1988 | |
| Kevin Mier | FTB | 18 May 2000 | |
| Melissa Mikec | SHO | 3 August 1987 | |
| Pamela Milano | ATH | 7 January 1999 | |
| Ketty Millán | SBL | 14 April 1984 | |
| Nancy Millán | CAN | 27 June 1987 | |
| Cristhian Mina | RQL | 22 March 1997 | |
| Franklin Mina | KTE | 11 March 1987 | |
| Diego Mini | BDM | 13 April 1999 | |
| Jonathan Miniel | BOX | 16 October 1996 | |
| Alberto Miño | TTN | 21 August 1990 | |
| Daniela Miño | HAN | 10 October 1996 | |
| Charlie Mirabal | BBL | 2 April 1987 | |
| Erick Miranda | FTS | 12 August 1987 | |
| José Miranda | GLF | 2 July 1994 | |
| Rafael Miranda | GLF | 21 March 1994 | |
| Julio César Mirena | ROL | 25 November 1995 | |
| Edison Mogollón | JUD | 24 January 1992 | |
| Jesús Mogollón | BBL | 30 October 1989 | |
| Diexe Molina | CAN | 2 November 1993 | |
| Joaquín Molina | SHO | 10 June 1992 | |
| Karen Molina | CAN | 8 January 2001 | |
| Mario Molina | WRE | 10 February 1989 | |
| Michela Molina | CYC | 17 January 1993 | |
| Robinson Molina | SWI | 5 May 1997 | |
| Moisés Molinares | TKW | 6 December 1991 | |
| Jacqueline Mollocana | WRE | 29 January 1994 | |
| Gonzalo Moncada | SHO | 26 December 1985 | |
| Odellani Monges | ATH | 11 March 1992 | |
| Joffre Monroy | FTB | 29 July 2000 | |
| Sugeiry Monsac | BK3/BAS | 26 February 1981 | |
| Jorge Montenegro | CYC | 26 September 1988 | |
| Anthony Montero | WRE | 24 May 1997 | |
| Melissa Montero | VOL | 11 March 1997 | |
| Armando Montes | SWI | 18 August 2002 | |
| Johan Montes | FTB | 4 January 2000 | |
| Kiara Montes | VOL | 13 January 2001 | |
| Wilfredo Montes | SWI | 18 August 2002 | |
| Jorge Montoya | WAP | 13 August 1976 | |
| Sara Montoya | RUG | 13 December 1996 | |
| Johan Mora | FEN | 3 January 1996 | |
| Carla Morales | SWA | 10 December 1999 | |
| Ignacio Morales | TKW | 12 August 1995 | |
| Jessica Morales | FEN | 20 August 2001 | |
| Juan Morales | OWS/SWI | 5 December 2000 | |
| Judith Morales | TTN | 21 November 1993 | |
| Sebastián Morales | DIV | 22 August 1994 | |
| Sebastián Morales | WAP | 26 October 1997 | |
| Andrea Morán | FTB | 14 October 1999 | |
| Jeyson Morelos | VOL | 20 August 1996 | |
| Catalina Moreno | HAN | 27 September 1999 | |
| Éder Moreno | ATH | 4 February 1989 | |
| Eli Johana Moreno | ATH | 15 April 1985 | |
| Juan Carlos Moreno | ATH | 31 January 1994 | |
| Junior Moreno | FTB | 3 March 2000 | |
| Paola Moreno | GLF | 22 August 1985 | |
| Víctor Moreno | CYC | 15 June 1995 | |
| Yerliane Moreno | FTB | 13 October 2000 | |
| Ángela Mori | TTN | 22 December 1993 | |
| Jonathan Morillo | WAP | 13 May 1994 | |
| Mirufay Morillo | WLT | 22 October 1990 | |
| Conrrado Moscoso | RQL | 26 September 1995 | |
| Heber Moscoso | TTN | 31 August 1987 | |
| Gabriela Mosqueira | ROC/ROW | 5 April 1990 | |
| Darlevis Mosquera | VOL | 23 June 2000 | |
| Francisco Mosquera | WLT | 1 April 1992 | |
| Gloria Mosquera | TKW | 6 September 1995 | |
| Jarlis Mosquera | WRE | 3 September 1983 | |
| Narlyn Mosquera | BAS | 15 December 1989 | |
| Santiago Mosquera | HAN | 19 April 1997 | |
| Diego Motoa | BOX | 30 January 1996 | |
| Aittana Moya | TKW | 15 April 1998 | |
| Brian Moya | TRI | 12 June 1993 | |
| Manuel Moya | TTN | 30 October 1993 | |
| María Paula Moya | SQU | 8 August 2001 | |
| Carlos Mujica | BOX | 8 December 1995 | |
| Anany Muñoz | CYC | 30 September 1999 | |
| Andrés Muñoz | ROL | 10 March 1988 | |
| Bastián Muñoz | TKW | 16 April 1995 | |
| Carla Muñoz | RQL | 12 February 1992 | |
| Carlos Muñoz | BWR/WRE | 3 August 1992 | |
| Daniel Muñoz | ARC | 22 March 1989 | |
| Edgar Muñoz | BBL | 30 October 1991 |