INT after ball 4

[Dave Reed]

Bruno,

In this case, the batter has become a batter runner, and he can only interfere with a thrown ball if he does so intentionally, and furthermore is "disregarding his try to get to 1st base" (from J/R). Perhaps intentional interference could occur if the batter doesn't realize it is ball four, and tries to help R1. Even then, the interference would need to be against a throw which was intended to retire R1 after he has overrun 2nd base, and has again become liable to be put out. I doubt you would ever see this sequence and timing of events in a real game.