from Amazon
Sunday, March 14, 2010
Change in performance as the game goes on
In The Book, we showed how the performance of the batter v pitcher improves each team he sees the pitcher. It was based on data from 1999-2002. One of my hopes is that aspiring saberists would extend alot of the work we did in The Book to look at historical data. Matt did just that:
First PA Second PA Difference
Timeframe AVG/ OBP/ SLG AVG/ OBP/ SLG dAVG/dOBP/dSLG
1955-59 .242/.314/.364 .261/.325/.403 .019/.011/.039
1960-64 .239/.307/.358 .255/.315/.392 .017/.009/.034
1965-69 .229/.296/.336 .246/.306/.369 .017/.010/.033
1970-74 .240/.310/.346 .253/.315/.374 .013/.005/.027
1975-79 .251/.319/.366 .262/.322/.392 .011/.003/.026
1980-84 .253/.317/.370 .263/.321/.393 .010/.004/.022
1985-89 .248/.314/.373 .261/.322/.403 .013/.008/.030
1990-94 .253/.319/.379 .264/.326/.402 .011/.007/.023
1995-99 .260/.329/.405 .273/.337/.437 .013/.007/.031
2000-04 .258/.325/.412 .271/.335/.440 .014/.010/.028
2005-09 .260/.324/.411 .271/.334/.435 .012/.010/.024