I'm not saying this as a Cub fan, but I have a hard time comparing this death to Oscar Taveras just because Taveras made the decision to drink and drive, which ultimately not only killed himself but his girlfriend as well.
Fernandez was not driving the boat, drugs nor alcohol are believed to be a reason for the death. The guy driving the boat was known for taking Marlins players out to sea often in the area.
Fernandez wasn't scheduled to pitch until tonight, so it's not exactly surprising he was up late, as I'm sure most athletes who have days off tend to have late nights.
That being said, I don't believe there has been an announcement as to when the crash even occurred. The boat was found at 3 AM. The crash could've happened much earlier in the night.