SELECT (SELECT "yards" FROM table_203_8 WHERE "player" = 'cecil moore') - (SELECT "yards" FROM table_203_8 WHERE "player" = 'raymond philyaw')
what is the difference in yards averaged between cecil moore and raymond philyaw ?
CREATE TABLE table_203_8 (
    id number,
    "player" text,
    "rec." number,
    "yards" number,
    "avg." number,
    "td's" number,
    "long" number
)