On Tuesday, former Indian Alan Embree picked up a W with 1/3 IP. However, the "inning pitched" is a bit deceiving, as he recorded his only out via a pickoff before throwing a single pitch in a tied ballgame. As luck would have it, the Rockies would score in the bottom half, and Embree would be relieved of his duties and pick up a win without ever throwing a single pitch.
I'm sure Jayson Stark will be informing us as to how many times, if at all, this has happened in the past.