Moreover, without knowing the position and movement path of the ball, there's no way to know if there's a foul.
Assuming the OP is a non-ref: one of the key factors that fans/coaches/players often fail to recognize is that we will only call fouls that either affect player safety or affect the play. An obvious take-down hold 20 yards away from the ball on a sweep play may not get called, but on the next series, a little jersey tug may be called because it took a would-be tackler off a viable path to the ballcarrier two yards away.
