The Globe article doesn't state a cause but it might have been an embolism.
WBZ | CBS Boston NewsVerified account @wbz 32m32 minutes ago
JUST IN: Boston Globe announces veteran sports writer Nick
Cafardo has died at the age of 62.
Cafardo suffered an apparent embolism at Spring Training and could not be revived by Red Sox medical staff
Lots of glowing tweets about what a nice guy he was...
MLB CommunicationsVerified account @MLB_PR 17m17 minutes ago
We send our deepest condolences to the family, friends and readers of Nick Cafardo – a talented writer, a true professional and a friend to so many throughout our game.
Steve BuckleyVerified account @BuckinBoston 16m16 minutes ago
Nick Cafardo’s passing has stunned all of us here in Fort Myers. One of the giants of our business, Nick was a kind, decent man who brightened the press box. As someone who sat next to him for more than 25 years,l can attest to his good nature.
Andrew MarchandVerified account @AndrewMarchand 27m27 minutes ago
Tragic news about a great man, Nick Cafardo. Nick was not only a top reporter, but always a friendly face at Fenway or Yankee Stadium.
Lou MerloniVerified account @LouMerloni 35m35 minutes ago
Nick Cafardo was one of the best beat guys I’ve come across. He was loved by everyone. Today’s news was tough to hear. I feel awful.
Bob NightengaleVerified account @BNightengale 30m30 minutes ago
I absolutely loved this man. Nick Cafardo was one of the greatest people I've ever met in this business, and such a dear friend. Absolutely heartbreaking. The sports world lost a great one, and I can't tell you how much we will miss him.
Toucher and Rich @Toucherandrich 15m15 minutes ago
I never once heard anyone say a bad word about Nick Cafardo as a person, which is unbelievably rare in this industry. He’ll be missed.
Keith OlbermannVerified account @KeithOlbermann 8m8 minutes ago
Nightmare news from spring training. He was one of the true good guys - with everybody.
#RipNick
Mike LupicaVerified account @MikeLupica 4m4 minutes ago
There are simply no proper words to describe the sudden loss of Nick Cafardo today. There was no one in our business more respected. There was no one who was ever better company at the ballpark. He was a wonderful writer, and even more of a gent. Too young, far too soon.
Tim KurkjianVerified account @Kurkjian_ESPN 50s50 seconds ago
We are crushed. They don’t get better personally and professionally than Nick Cafardo. Rest In Peace, my friend.