Posted by jrd_x on 2/29/2012 1:13:00 PM (view original):
Posted by eschwartz67 on 2/29/2012 1:11:00 PM (view original):
The real problem is.... WHIP does NOT rely heavily on BABIP. If it did, I would agree that it is a very flawed stat.
BABIP has a very small range of deviation from highest to lowest, with the vast majority contained very close to the median, because as Jrd pointed out.... pitchers cannot control where a batted ball that stays in the ballpark lands on a consistent basis.
Balls in play (BIP in the BABIP stat) varies A LOT by pitcher though. So, if a pitcher like Randy Johnson has a BABIP of .280 and Bob Tewksbury's is .278 (I dont know what they really are, they are just examples), but since Johnson was higher in BB/9 and K/9, his BABIP affects WHIP much less than Bob Tewksbury's BABIP affects his. Tewksbury (with a very low BB/9 and K/9) had the majority of his outcomes that produced his WHIP occur through events that affect BABIP. Johnson (with a higher BB/9 and a MUCH higher K/9) had a much smaller percentage of his outcomes that produced his WHIP occur through events that affect BABIP.
In summary.... BABIP does affect WHIP. But not to a large degree.
Even if it's just a small difference, why not take BABIP out?
Jrd... The Law of Syllogism that I posted before holds true if all statements in your progression are true. I am older than my brother John. John is older than my sister Susan. I am therefore by the law of syllogism, Older than Susan. I would be older than Susan if the preceding 2 statements were true.
So....
BABIP is meaningless
BABIP is a large part of WHIP
WHIP is meaningless
This would be true if the first 2 statements are true. Your problem is the 2nd part (BABIP is a large part of WHIP) is NOT TRUE.
Follow my logic here..... we all agree that most every pitcher will be tightly grouped with not much difference in BABIP, and a pitcher's BABIP being significantly better than anothers is NOT a reliable indicator of better performance. But NONE of that is true for WHIP. Pitchers are NOT tightly grouped with a low standard deviation when it comes to WHIP. There is GREAT deviation from pitcher to pitcher when it comes to WHIP, and a pitchers WHIP being significantly better than anothers IS a reliable indicator of better performance. That is so because BABIP does not greatly influence WHIP