Conversation so far:
When was the Whitaker vs Trinidad fight?
On February 20, 1999, Whitaker suffered his first convincing defeat against the much bigger, much fresher Félix Trinidad.
How many rounds did the Whitaker vs. Trinidad fight last?
The Whitaker vs. Trinidad fight lasted 12 rounds.

Question: What happened in the last round?
Self-contained rewrite: What happened in the last round of the Whitaker vs. Trinidad fight?