|Date of birth||October 18, 1986|
|Height||1.86 m (6 ft 1 in)|
|Weight||80 kg (12 st 8 lb)|
|Rugby union career|
|Years||Club / team||Caps||(points)|
|Sevens national teams|
|Years||Club / team||Comps|
Injera started playing rugby while at Vihiga High School in Vihiga. After graduation in 2005 he joined military team Ulinzi RFC playing in the Kenya Cup league. The team was later disbanded, and he moved to Mwamba RFC, a Nairobi-based team where he plays as a wing.
Now a strong player for the Kenyan Sevens squad, Injera debuted with the team at the 2006 Dubai Sevens  and played in the 2009 Rugby World Cup Sevens, where Kenya reached the semifinals. He became the top try scorer for 2008–09 IRB Sevens World Series season with 42 tries. He also scored 210 points and finished second behind Ben Gollings of England in the individual points table. Injera was also nominated for the IRB's sevens player of the year award, which was eventually won by Ollie Phillips of England. Injera won the Kenyan Sportsman of the Year award in 2009.
Injera has also played for the Kenya national rugby union team (15s), playing at the 2011 World Cup Qualifiers. His older brother Humphrey Kayange is captain of the Kenyan sevens squad. Their younger brother Michael Agevi also plays rugby for the Sevens. Injera has a degree in mass communication from Kenya College for Communication Technology (KCCT).
In February 2013, Injera was dropped from the Kenya National Sevens Team and his contract was cancelled by the head coach Mike Friday. This was because of a conflict between Injera's club Mwamba RFC and the Kenya National Sevens Team. This conflict led to Injera missing training sessions with the Kenya National Sevens Team and therefore breaching his contract. As a consequence of this breach, Injera's contract was cancelled.