Sean Doolittle was a first baseman before last season, and he threw exactly one inning in rookie ball. Now he's the ace lefty setup man for a division winner. That's the story of the year, bullpen or otherwise.
But Brian Matusz has to be a close second. After having one of the most miserable seasons in baseball history, Matusz didn't fare much better this season. As a starter, he was 5-10 with a 5.42 ERA, poor walk numbers, and a mediocre strikeout rate. The Orioles sent him to the minors, and he was okay, little more.
Then he came up as a late-inning specialist and became unhittable. Okay.
Matusz faced 47 batters out of the bullpen in the regular season. He allowed five hits and three walks. In Game 2, he came in for the seventh and got Nick Swisher with two on and two out. He stayed in for the next inning, allowed a single, then struck out Russell Martin looking and Curtis Granderson swinging at a 55-foot breaking ball. Eduardo Nunez popped out to end the inning, and Matusz left unscathed again.
I don't even know why you're reading this. I don't know anything about baseball. No one knows anything about baseball. We should probably just watch it and stop thinking so much.