To use a real example, but in another sport, ie the Munich air disaster that wiped out most of the Manchester United team in the 50s, it has only added to the legend of "Bubsy's Babes". They are still considered one of the best sides ever, notwithstanding their opportunities to win more trophies was tragically cut short.
Sometimes a tragedy can enhance the reputation of a person, rather than cut it short. Look at Elivis, still considered the King. Marilyn Monroe, still probably considered the greatest female entertainer of all time.
So to use the example in the OP, chances are that the player, whoever it was, may just be considered a GOAT, and there would be people of the player's era arguing with future generations just how good he was.
That is all.