There have been observant players even in the majors, most notably the great Sandy Koufax, who declined to play on Yom Kippur.
Sandy Koufax was among the observant players in the major leagues. 
mnli hypothesis: Sandy Koufax was among the observant players in the major leagues.  premise: There have been observant players even in the majors, most notably the great Sandy Koufax, who declined to play on Yom Kippur.