In the modern age, an “every-down” halfback has to have a combination of running ability, pass-catching ability, and blocking ability. The "every-down" designation comes from a running back's ability to perform important functions beyond rushing on the ever-increasing number of passing plays such as receiving the ball and pass-blocking for their quarterback. A primary running back also needs abundant stamina to remain consistent in an up-tempo offense. Backs such as Walter Payton and Emmitt Smith were appraised for their versatile running styles and abilities. More recent examples include Adrian Peterson of the Detroit Lions, Todd Gurley of the Atlanta Falcons and Melvin Gordon of the Denver Broncos.