No call on contact OOB?

[voiceoflg]

I do play by play for high school football and baseball and try to keep myself up on the rules of both. I produce the radio broadcasts of a D-1 school for football and basketball, so I am not as knowledgable on those rules as I don't have to talk about them on the radio.

So I need some help on a situation yesterday. Loose ball and players from both teams went for it. B1 gets it but his momentum made him step OOB. A1 is still two steps away at the whistle but takes those two steps and ran into B1. B's HC complains to the official and the official plainly says "Contact was made after your man stepped out of bounds. No foul."

This wasn't incidental contact, but pretty solid contact. I've seen similar hits OOB in football that drew 15 yard penalties. No forearms or anything like that, but a good shoulder to shoulder hit.

Probably HTBT and I have no video of it. But what is the rule on contact OOB in an NCAA game?