From an association quiz

[IRISHMAFIA]

Originally Posted by AtlUmpSteve

That said, based on the OP (not force outs, just bad baserunning), I have two outs on THAT play. While the thread has morphed, I believe IrishMafia is addressing those that state it will always be a double play if the rule is applied retroactively, not so much the initial post.

I'm going to respectfully disagree with Steve.

What else do you expect runners to do that see the ball roll fair and the umpire has NOT made the appropriate call that protects them? After all, they cannot read what is in the umpire's mind as to whether s/he judges the ball to be catchable with ordinary effort. You may call it dumb base running, I may call it indecision based upon an umpire failure.

IF the umpire does make the call retroactively, I don't believe s/he has a choice than protect BOTH teams.