I'm sure plenty will disagree, but I think Mankind was one of the worst champions. I'm not saying he didn't deserve the title. I thought his first title win on Raw was awesome. His title reigns however were nothing special at all. He is a three time champion for a comibned total of about one month. His first two reigns were just one feud with The Rock and his thrid lasted 24 hours. He had no business winning that third title in the first place. Of course guys like Vince McMahon or Andre The Giant had worse reigns but that's obvious and everyone recognizes it. On the other hand everyone always seems to praise Foley for being a three time champion without realizing his reigns weren't very good.
Finally, being a champ isnt just in defenses, but in the matches you have. He lost his title to the rock in an i quite match in the match of the year, with a really great and original ending. And he did have a defense, in his last man standing match with the rock. These two had a great fued and traded the belt back and forth, that is what made mankind a good champion. Saying what defense did he have should be asked on someone like andre the giant, which you did not do, so saying foley is the worst, is again laughable.
You should read more carefully before you criticize. I realize the thread is about the worst champion but I clearly stated guys like Andre The Giant and Vince McMahon are such obvious choices that they were not worth mentioning. Instead I decided to name someone who many consider to be a good champion even though he wasnt. I agree that Mankind vs. Rock was a great feud but that doesnt mean Mankind was a great champion. I know he walked in and out of St. Valentines Day Massacre with the title, but he did not actually win the match. The I Quit match may have been match of the year but in my opinion the best match of 1999 wouldnt even make the top five or even ten in most other years. Bottom line is Mankind was a three time champion for a combined 47 days without any memorable title defenses and only one feud. He was a great competitor but not a great champion.