Win Probability Added is a great metric, but we can improve upon it.

These unheralded pitchers can sometimes make all the difference in the world.

From Europe to Asia to the Carribean – and even, in one case – an actual ocean, we begin the construction of an all-world team.

How do pitchers best deceive batters with their breaking balls?

Two pitchers, 32 years apart, show how effective nontraditional reliever use can be.

Bill James thought John McGraw was an early genius with the bullpen.

Jeff Passan’s new book is both comprehensive and compelling.

It hasn’t been easy, but he has persevered.

Visualizing pitches by both process and outcome.

Some insights into pitchers’ season-long endurance.