If player a is running down the sideline and player b standing on the sideline tackles him and he fumbles does the referee advance the ball?
If the man standing on the sideline tackle the guy running down the
sideline, then it would be an interference because once you step
off the field and back on you inactive for the rest of the play and
it would not count so the referee would not advance the ball at
*Because this is a blatant rulebreaking which has the potential
to prevent a touchdown or great yardage gain, the ref would
probably give a personal foul and a fifteen yard penalty, or even
might award the penalty touchdown. The player concerned (the one
who tackled) is also quite likely to be ejected for extreme
If you are talking like what Woodey Hayes did, there is a rule
in all levels for 'flagrant fouls'. The referee in these situations
can make any penalty he deems fair, including awarding points.