The thing about pitching wins and losses is this: Someone with a lot of wins is more likely to be a good pitcher. Someone with a lot of losses is likely to be a bad pitcher. However, the closer you get to .500, the more wonky things can get, because there are aspects of pitching wins/losses that aren’t really in a pitcher’s control.
Pitching wins and losses can get even more wonky when it comes to relievers, as evidenced by Wednesday night. Josh Donaldson’s walk-off grand slam allowed the Yankees to rally for an 8-7 win over the Rays in 10 innings.