Obstruction

[bob jenkins]

This thread reminds me of the similar, much discussed, play: R1, off on the pitch. BR flies to right. F1 realizes that there might be a chance to "double up" R1, so F1 moves to back up the expected throw from F9 to F3. While crossing the foul line, F1 gets in the way of BR. The fly ball is caught. Place the runners.

NAPBL (and probably other OBR sources) have specific language that the obstruction is ignored. IMO, that logic should be applied to FED as well.