The Eric Shirley Shield is a rugby union tournament in the Kenyan domestic league. It was founded in 1962 as a second tier competition to the Nairobi District Championship http://www.nation.co.ke/sports/rugby/Kenya-Cup--The-rise-and-rise-of-KRU-s-premier-club-tournament/-/1106/1701796/-/nwaseo/-/index.html
For the 2016-2017 season, the league consists of twelve teams divided into two pools. Participating teams are reserve sides from clubs participating in the top tier Kenya Cup.http://www.ragahouse.com/eric-shirley-shield-to-kick-off-on-saturday/ There are sixteen rounds of pool games followed by a knockout competition to determine an overall winner.
There was a major upset in 1982 when Lenana School won the shield.