Based on that video, Garrett could have let up just like MLB did - he saw the ball come out. Garrett hung on him and made an actual twist to gain torque to bring him down and Rudolph face plants in to turf. Was it an unnecessary hit by the rule book - no I don't think so, but was it necessary for Garrett to hang on him and twist on the last play of the game - no I don't think so either. The MLB had already retreated 5 yds by the time Garrett wrestled him down.