Base running mistake negates HR

[VolFaninFla]

Cody Bellinger called out, has 2-run homer taken away after bizarre base-running gaffe

I cannot recall seeing that before.

 

[SGMVols]

How do big leaguers not know that you can’t pass another baserunner?

 

[05_never_again]

How do big leaguers not know that you can’t pass another baserunner?

I wonder if he thought that since it was a HR (and therefore out of play), passing another baserunner wouldn't matter. If I was Bellinger, I probably would have thought the same thing.