In which sport does an urn of ashes serve as an unofficial trophy?
Correct answer: Cricket

Player Sherry
I did not know this and couldn't find any information about it. So I chose a majority hint and was surprised to see how many people did know this!

Castra
This description was taken, verbatim, from Google.
It mentions Bligh, but doesn't explain who he was.
He was Ivo Bligh, 8th Earl of Darnley who became the captain of the English cricket team.
The Ashes were presented to him after the 1882-83 season.

Tom
Player Sherry,
it is, perhaps, the most famous trophy /competition in test cricket.

The Horror
Zappo, the ashes are of cricket bails not a person

baymax
and it's tiny. really small?!
I never realized it was that small

Guillermo Jr.
not quite as snazzy as a green jacket..