Behind the Seams

Bob Costas takes a look at the evolution of statistical analysis in baseball. It started in 1857 when Henry Chadwick created the first boxscore, so that quantifying the game would give baseball a sense of legitimacy. That was followed by institutions like the Elias Sports Bureau and the Baseball Encyclopedia, leading to today's sabermetric revolution of Bill James and Billy Beane.

The evolution of baseball's ballparks, from 19th-century wooden parks to the modern cathedrals of today, plus a look at their impact on how the game is played and understood.

A look at baseball's use of the designated hitter, which began in the American League in 1973.