Simple Question -

[SC Ump]

Originally Posted by Justme

Defense gets upset and tells me that I should call the BR out due to the base runners interference.

Two parts to your question:

1. "Defense gets upset"

• Yep, you were definely on the SP softball field. They whine about everything... don't worry about that.

2. "I should call the BR out due to the base runners interference"

• The ball was dead immediately when it hit the runner (presuming it meets the conditions in 8-7-K of not having passed an infielder.)
• The runner is out if not in contact with the base and safe if still in contact with the base. In either case, the BR is awarded 1st base.
• Possible but I don't see it in your example: if you felt the runner was interfering in an attempt to prevent a double play 8-7-J could come into effect, with the runner and the immediate succeeding runner both being called out.

I think you got it right, except for remembering that there was officially no "overthrow" or other play at first since the ball was dead at that point.