Look back rule

[Skahtboi]

Originally Posted by UmpireErnie

Doesn't sound like F1 made a play but as has been stated you have to see it. It is judgement and not sure it needs to be "tightened up".

But not sure why you would have an LBR out here anyway.. R1 is on 3B so she is fine, while the batter-runner who just walked, opted to continue past 1B to 2B. Even if F1s walk to the back of the circle is NOT considered making a play, so far nothing has happened which would trigger an LBR out.

If the ball is in the possession of the pitcher in the circle, once R2 reached first base the LBR is in effect.

To the OP, checking to see how they would enforce the LBR will probably get you an answer along the lines of "as described in the book," which will put you no further along than you were before you asked.