Handicappers Ever dream of hitting a trifecta? Los Angeles handicappers Jack Karlik and Jimmy “The Hat” Allard set the odds and know a thing or two about what it takes to win at the track. Bill “Grumpy” Jenkins Former super stock driver Bill “Grumpy... (more)” Jenkins has revolutionized drag racing with his engine building techniques. The cantankerous NHRA legend is a mechanical mad scientist who fuels the sport he helped build.