Conversation so far:
What wrestling league was Big Boss Man in when Big Boss Man (wrestler) was pursuing the Hardcore Championship?
In the WWF's Hardcore division.
What is a notable match that he had during this time period?
Boss Man became the #1 contender for the WWF Championship by defeating The Rock on the November 15, 1999 episode of Raw.
Did he eventually win the WWF Championship?
The Big Show defeated him to retain the title and end the feud.
Did he feud with any other wrestlers?
Boss Man's major feud was with Al Snow.
Did they have a match against each other?
At SummerSlam, the two had a Falls Count Anywhere match that spilled into the backstage area, the street and, finally, into a nearby bar.
Who won the feud?
Snow won the match.

Question: Was Big Boss Man ever a part of a tag team?
Self-contained rewrite: Was Big Boss Man ever a part of a tag team?