Mercy Joseph
Mercy Mwethya Joseph is a Kenyan badminton player. She was selected among the 14 best African players to be a member of the Road to Rio Program organised by the BWF and Badminton Confederation of Africa, to provide financial and technical support to African players and the lead-up to the 2016 Olympic Games in Rio de Janeiro. She was the women's doubles bronze medallist at the 2015 All-Africa Games, and has competed at the 2010, 2014, and 2018 Commonwealth Games.
Achievements
All-Africa Games
Women's doubles| Year | Venue | Partner | Opponent | Score | Result |
| 2015 | Gymnase Étienne Mongha, Brazzaville, Republic of the Congo |  Lavina Martins |  Kate Foo Kune Yeldy Marie Louison | 10–21, 11–21 | Bronze |
BWF International Challenge/Series (1 title, 2 runners-up)
Mixed doubles| Year | Tournament | Partner | Opponent | Score | Result |
| 2020 | Kenya International | John Wanyoike |  Adham Hatem Elgamal Doha Hany | 10–21, 14–21 | Runner-up |
| 2014 | Kenya International | Patrick Kinyua Mbogo |  Donald Mabo Ogar Siamupangila | 21–4, 21–23, 16–21 | Runner-up |
| 2013 | Kenya International | Patrick Kinyua Mbogo | Matheri Joseph Githitu Lavina Martins | 21–8, 21–19 | Winner |