Method
Version 2.0 of dERA uses the following statistics:
- Batters Faced (BFP)
- Home Runs Allowed (HR)
- Total Walks Allowed (BB)
- Intentional Walks Allowed (IBB)
- Strikeouts (K)
- Hit Batsmen (HB)
0) Multiply BFP by 0.0074 to get the number of intentional walks allowed (dIBB).
1) Divide HB by BFP-IBB. Call this $HB. Then multiply $HB by BFP-dIBB. This number gives the DIPS number of Hit Batsmen (dHB).
2) Divide (BB-IBB) by (BFP-IBB-HB), and call this number $BB. Multiply BFP by 0.0074, and call this dIBB.
- 2a) Then multiply $BB by (BFP-dIBB-dHB). Take this number and add IBB. This number is now the DIPS number of total walks allowed (dBB).
3) Divide K by (BFP-HB-BB) and call this number $K. Remember this number for later.
- 3a) Multiply $K by (BFP-dBB-dHB). This gives the DIPS number of strikeouts (dK).
4) Divide HR by (BFP-HB-BB-K) and call this number $HR. Remember this number for later.
- 4a) Multiply $HR by (BFP-dBB-dHB-dK). This gives the DIPS number of Home Runs (dHR).
5) Calculate the number of 'Balls Hit in the Field of Play'. This is BFP-dHR-dBB-dK-dHB.
6) Estimate hits per balls in the field of play ($H):
- 6a) Take the number 0.304396 and subtract 0.010830 if the pitcher is strictly a knuckleball pitcher. If not keep the 0.304396 number.
- 6b) Take the result from the last step and add 0.002321 if the pitcher is left-handed, if not keep the number from the above step.
- 6c) Take the $K figure from above and multiply it by 0.04782. Subtract this number from the number in 6b.
- 6d) Take the $HR figure from way above and multiply it by 0.08095. Subtract this number from the number in 6c.
- 6e) Whatever remains is the $H figure.
7) To get the projected number of Hits Allowed (DIPS 'Hits Allowed', or dH), multiply $H by the number of balls hit in the field of play (BHFP).
- 7a) Add this number to dHR. This number is the DIPS total of Hits Allowed (dH).
8) Take BFP-dBB-dHB-dK-dH and multiply that number by 1.048. Add dK to that number. Take that number and divide by 3. This is the DIPS total of Innings Pitched (dIP).
9) Sum the following products:
- (dH-dHR)*0.49674
- dHR*1.294375
- (dBB-dIBB)*0.3325
- dIBB*0.0864336
- dK*(-0.084691)
- dHB*0.3077
- (BFP-dHB-dBB-dK-dH)*(-0.082927)
The sum of all of these is the DIPS total of earned runs (dER).
10) Calculate ERA as usual: (9*dER)/dIP. This is the DIPS ERA (dERA).
Read more about this topic: Defense-Independent ERA
Famous quotes containing the word method:
“... [a] girl one day flared out and told the principal “the only mission opening before a girl in his school was to marry one of those candidates [for the ministry].” He said he didn’t know but it was. And when at last that same girl announced her desire and intention to go to college it was received with about the same incredulity and dismay as if a brass button on one of those candidate’s coats had propounded a new method for squaring the circle or trisecting the arc.”
—Anna Julia Cooper (1859–1964)
“I do not know a method of drawing up an indictment against a whole people.”
—Edmund Burke (1729–1797)
“The method of scientific investigation is nothing but the expression of the necessary mode of working of the human mind. It is simply the mode in which all phenomena are reasoned about, rendered precise and exact.”
—Thomas Henry Huxley (1825–95)