[Walt Longmire]

According to the NFHS rulebook pass interference occurs when:

"Any A or B player who is beyond the neutral zone interferes with an eligible opponent's opportunity to move toward, catch or bat the pass."

Grundy was clearly still trying to move towards the ball and was getting ready to jump for it. By the very definition of the rule it is pass interference. The defender does not have the right to simply hold that spot if it impedes the receiver's ability to try and catch it. This isn't basketball where a defender can spot up and take a charge. And for the ones that said that Grundy couldn't have caught that ball, you must not have seen the catch he made on a very similar throw against LCA. On that one the defender went up with him to try and bat it down instead of blocking him.

Either way that call is no more responsible for the final outcome than the reversal of the fumble would have been if Mayfield had won by those 3 points. When it all comes down to it Mayfield had Somerset down by 3, 84 yards away from the end zone with 28 seconds and no timeouts. If you don't finish that it's on you, not the refs.