A bizarre MLB rules quirk somehow meant Yasmani Grandal didn’t interfere with throw to home

This was so bizarre.

The Chicago White Sox are still alive in their ALDS matchup against the Houston Astros thanks to a 12-6 win on Sunday … and a rules quirk that has fans everywhere scratching their heads.

With the Sox up 7-6 in the 4th inning and runners on first and third, catcher Yasmani Grandal hit a grounder to Yuli Gurriel at first base. The runner at third, Luis Robert, took off for home, so Gurriel threw down the line … except he hit Grandal in the shoulder, the ball went wide of Martin Maldonado’s glove and Robert scored.

But Gurriel was very much outside the first-base line, which had everyone — including the Astros — claiming it was interference. It wasn’t!

It’s time to learn yet another MLB rule to explain why this WASN’T interference: