William Luther Griggs (b. September 16, 1968 from Anaheim, California U.S.) is an American "Old School/Mid School" former professional Bicycle Motocross (BMX) racer whose prime competitive years were from 1985 to 1996. His nickname was "Mr. Bill" which was a play on his name and an allusion to a late 1970s Saturday Night Live skit called "The Mr. Bill Show." Billy Griggs had a more successful career than most, winning two World Championships during his amateur days, but did not quite make it to the top in pro although he would consistently make the mains.