William Tyler Jenkins (December 22, 1930 – March 29, 2012), nicknamed "Grumpy" or "The Grump", was an engine builder and drag racer. Between 1965 and 1975, he won a total of thirteen NHRA events. Most of these wins were won with a four-speed manual transmission. In 1972 he recorded 250 straight passes without missing a shift. He was nicknamed "Grumpy" for having a no-nonsense attitude at races. The Motorsports Hall of Fame of America said: "his continual search for improved performance left little time for idle chatter with his racing colleagues."