Well, that's not literally true. Mitch Williams probably threw the worst pitch ever.
This might be the ugliest pitch ever:
An outlier? Sure! But Felix Doubront's control was hardly stellar the rest of the time, either, as he walked six Rays in five innings. The good news was that Doubront gave up only two runs, and eventually the Red Sox actually won the game.
The other good news was that Doubront's ERA fell from 6.40 to 6.03. Baby steps.