OK, I read
"As B4 tried to get up to go to 2B, she was OBS by F3 trying to chase down the loose ball."
as
on the base, having reached it after the initial collision.
Irish & others apparently read that as before 1st base.
No wonder we don't agree. ----- My post 2 days ago:
"Still, I think and hope that all 4 of us would be more in sync seeing the actual play, rather than the written description."
There were only 4 at that time, Young and Slick later, so now I would say the same about 6 of us.