John "Red Rocks" Farrell (c. 1857-?) was an American criminal, thief and member of the Whyos, a prominent New York street gang during the mid-to late 19th century. One of the more colorful members of the gang at the height of its power, he spent nearly half his life in correctional institutions.In late 1891, Farrell was convicted of drugging and then robbing a man and sentenced to two years imprisonment in Sing Sing.