Jacques Burger and Petrus Du Plessis join the centurion club as they start in Saracens' semi-final against Northampton.
England and Bath fly-half George Ford has been named the Aviva Premiership Player of the Season for 2014-15.
Saracens stormed into the Aviva Premiership play-offs with a 68-17 victory over relegated London Welsh.
There is still plenty to play for in the final round of the regular Aviva Premiership season on Saturday.
Saracens have signed promising back-rower Joel Conlon from Exeter Chiefs.
Bath and England centre Jonathan Joseph received double recognition at the annual Rugby Players' Association awards.
Exeter Chiefs have taken another step towards a Premiership play-off place with a 24-20 win over Saracens on Sunday.
Stuart Barnes says that players should not be banned for accidental acts after Iain Henderson was red-carded for Ulster.
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