“Black Mamba”.  “Super Mariota”.  New additions to a prolific history of great Duck nicknames.  Another great one?  “Scrappy.”   As in, Floyd “Scrappy/Scrap Iron” Rhea, one of the more interesting linemen to play for Oregon in the early 1940’s. Born in Rhea’s Mill, Arkansas on September 21, 1920, Rhea’s family moved to California shortly thereafter, with Floyd growing up in Fullerton. …