A pitcher’s win-loss record (W-L) was for a century the main way to judge a pitcher. The win (W) goes to the pitcher who was in the game when his team took a lead it never gave back; the loss (L) goes to the one who allowed the run that put the opponent ahead for good.
How are they awarded?
For a starter, he normally has to pitch at least five innings and leave with his team in front. But the decision depends heavily on things outside his control: run support, the bullpen and the defense.
Why they’re debated today
A pitcher can throw a gem and lose because his team didn’t score, or win despite a rough outing. That’s why sabermetrics stopped trusting the W-L and prefers metrics like ERA, FIP or WAR to judge a pitcher.
Records and examples
- Career wins record: Cy Young, with 511 (a mark that’s impossible to match today).
- Bartolo Colón, with 247 wins, is the Latino pitcher with the most victories in history.
[Live data — MLB API] Current-season wins leaders: (filled in automatically).
Related stats
Frequently asked questions
Why can a good pitcher have a bad record?
Because the W-L depends on run support, the bullpen and the defense, not just on how he pitched.
Is it still important?
Less and less: today the game prefers metrics that isolate what the pitcher actually controls.
