 At the beginning of 2010 , Justice John Paul Stevens was the sole remaining Protestant on the Court . In April 2010 , Justice Stevens announced his retirement , effective as of the Court 's 2010 summer recess . Upon Justice Stevens ' retirement , which formally began on June 28 , 2010 , the Court lacked a Protestant member , marking the first time in its history that it was exclusively composed of Jewish and Catholic justices . 
