Broncos @ Miami - December 21st,1998. "The Lamar Thomas game"
A memorable one for me because I was just beginning to understand the game in more detail. Watched it with my father and I remember celebrating like mad after the Oronde Gadsden TD in the 4th that put us up 2 scores. Can visualize that play to this day.
After that game, we really believed Miami had a shot to win it all. The rematch against Denver in the divisional round was tough to stomach.
This was game that cemented me as a life long Dolphins fan.
Edit: Game box score:
Denver Broncos 21 at Miami Dolphins 31 on December 21st, 1998 - Full team and player stats and box score
www.pro-football-reference.com