To be fair, he was rated 962 before the update yesterday, so he was eligible when he registered.
The pdga faq on such circumstances says
I pre-registered for an event and my updated rating is now too high for the division I entered. Now what?
If you have pre-registered, the TD may allow you to remain in that division as long as the event is within two weeks of the ratings posting date. If you did not pre-register before the new ratings were posted, then you are expected to play in the division (or higher) where your new rating now resides.
So since it's just over 2 weeks, I don't know whether the TD has latitude to allow him to play or not. It's not as clear cut as it seems.
The 2 week rule is only affected within Amateur. If a player signs up for INT and then their rating jumps over 935 within 2 weeks of the event, they can stay in INT because they are both Amateur divisions.
If a player signs up in ADV and has a Pro classification and there rating jumps to 972 or higher, even if its the day before the event, they would be ineligible to play in the event as an Amateur player.