irbsevens.com and James Mortimer 23.Apr.2013Getty Images
The prolific wing, who has scored 155 tries in IRB Sevens rugby - the fifth-highest total of all-time - missed the last tour to Asia but is now available for selection.
Injera's return offsets the blow of losing Dennis Ombachi and Sidney Ashioya through work and study commitments.
Felix Ayange receives his first call-up under Friday, completing a remarkable return to form after sustaining an achilles tendon injury during the Safari Sevens.
"We are aware of the challenge we face in Glasgow. We have confidence in our ability and will approach each match as it comes as we look to post positive results to carry us through to the next stage of the competition," said captain Andrew Amonde.
So far this season Kenya have reached four out of seven Cup semi-finals, plus one Cup final appearance in Wellington, where they beat hosts New Zealand.
Currently they lie fifth-equal with France in the Series standings and in Glasgow face Samoa, South Africa and Canada in pool play.
Kayange targets Moscow return
While not yet fit enough to compete for Kenya on the HSBC Sevens World Series, Injera's brother, former captain Humphrey Kayange, is set to play for the country's 'Shujaa' side at the upcoming CAR Africa Sevens in Mombasa at the end of April.
There he hopes he can convince coaching staff that he will be ready to take his place in the pre-Rugby World Cup Sevens training camps at the end of the current Series, in the build-up to the World Cup tournament in Moscow on 28-30 June.
Kayange played for Kenya at round three of the Series in South Africa, scoring five tries, but has not played since then. He is studying at Bristol University in the UK and is currently in Kenya for a two-week holiday, during which time he is training with the Kenya squad.
“I will play in Mombasa with the rest of the team selected and let's see how things go,” said Kayange, who observed that the expected conditioning levels had risen under Friday.
“The skill-set is still there and I play for Bristol, but the Sevens environment has changed. The boys are fitter, stronger and faster and in the next two weeks I want to be at par with the rest of the team and I know I will get there,” Kayange added.
“It's been a good season for the side with the amount of points we have received so far but they can get better and with the two legs remaining the boys can hit their target,” he added.
Kenya squad for Series climax in Glasgow and London: Andrew Amonde (KCB RFC, Captain), Oscar Ouma (Menengai Oil Nakuru), Davis Chenge (Western Bulls), Patrice Agunda (Lunch Bar Quins), Felix Ayange (Lunch Bar Quins), Horace Otieno (Mwamba RFC), Eden Agero (Lunch Bar Quins), Michael Wanjala (Strathmore Leos), Biko Adema (Total Nondies), William Ambaka (Lunch Bar Quins), Collins Injera (Mwamba RFC), Billy Odhiambo ( Strathmore Leos).