[TexBlue]

It's still gonna depend on certain things. And these are just certain situations I can think of.

1) If the fielder is between the runner and 1st, the runner must "surrender" herself or interference could occur. You can't keep on running straight into the runner with a runner going home.

2) If the runner is in foul territory and F3 fielded the ball in fair territory, then went to the foul side to tag the runner, you probably have a train wreck, play ball.

3) With the situation the same as in 2 and the runner swerves, or drops a shoulder or raises her arms, you have interference.

You just have to take each situation on it's own merits and your own judgement. The situation will change every time. But, just because contact was made while F3 was trying to complete a double play does not always result in interference.