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It's happened to teens playing impact sports, even baseball, and there's not a great survival rate.
That is really good news. Honestly didn't think he would recover given the length of CPR needed, very glad to see I was wrong. >

Same. I hate to say that I thought he was a goner or at least had brain damage. It seems they were pumping him with oxygen the entire time his heart was stopped. Maybe that was they key, dunno.
Amazing news in any case. >

Yeah, I’m sure it was the key. 
For years the NFL’s biggest fear has been having a player die on a highly watched nationally televised game. It’s hard to say football is “safe” when 30 million people watch a guy die playing it. 
And so every stadium has well-rehearsed drills for cardiac and airway events (as well as high-level medical specialists on hand) to get severely injured players the best immediate care and the fastest evac possible to a level 1 trauma center.
If this happened at a high school or college game, I don’t know that he’d still be alive. 
TLDR; an NFL field is probably the best place on earth for a commotio cordis event.