Mombasa RFC were on Saturday relegated from the Championship after losing 13-18 to Mean Machine in the final round of matches Feb 29 at the Mombasa Sports Club.
Mombasa needed to beat Machine to stand a chance of surviving relegation given Catholic Monks beat Northern Suburbs 23-15 in Nairobi.
The relegation of former Kenya Cup side means South Coast Pirates will be the only Coastal side featuring in top flight rugby with Mombasa dropping to the Coast Nationwide league.
Winners of the day Mean Machine sealed third place while Egerton Wasps finished sixth despite losing 13-18 to USIU. South Coast Pirates' defeat to perfect Strathmore Leos gave Wasps the leeway to playoffs.
Machine will play Egerton Wasps in playoffs with the winner set to play second placed MMUST at UoN with USIU hosting Northern Suburbs in the second match with the winner heading to play Strathmore Leos.
Mean Machine vs Egerton Wasps
USIU vs Northern Suburbs
Strathmore Leos vs (USIU vs Northern Suburbs)
MMUST vs (Mean Machine vs Egerton Wasps)
CUEA Monks vs N.Suburbs 23-15
Mombasa vs Mean Machine 13-18
SC Pirates vs Strathmore 20-40
Kisii vs Eldoret
UOE vs MMUST
Egerton Wasps vs USIU 13-18