That's the rule. The Steelers got nailed for it twice in the regular season on INT returns. While I think the way they're applying the rule stinks there would have been a large hue and cry from Steeler nation if they hadn't made the call in the SB given that the Steelers were so familiar with the penalized side of that rule already. As soon as you go low on a blocker, even if you're really trying to go low on a ball carrier and the blocker is just in the way, even if the blocker avoids being hit, it's a foul.
That's amazing. I've been watching football for 50+ years and never knew that.
Ditto to Ditto. I have said this several times earlier today.