In baseball statistics, defense-independent ERA (dERA) is a statistic that projects what a pitcher's earned run average (ERA) would have been, if not for the effects of defense and luck on the actual games in which he pitched. The statistic was first devised by Voros McCracken in 1999.[1][2][page needed]
0) Multiply BFP by .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).
^Wisewell, Aaron (2013-01-28). articles with dead external links%5d%5d%5b%5bCategory:Articles with dead external links %5d%5d[%5b%5bWikipedia:Link rot|dead link%5d%5d]The Baseball Coach. Lulu Press, Inc. ISBN978-1-105-60123-1. {{cite book}}: Check |url= value (help)
^Click, James; Keri, Jonah (2006-03-06). Baseball Between the Numbers: Why Everything You Know about the Game is Wrong. Basic Books. ISBN978-0-465-00596-3.
External linksedit
Defense Independent Pitching Stats
January 01, 1970
defense, independent, baseball, statistics, defense, independent, dera, statistic, that, projects, what, pitcher, earned, average, would, have, been, effects, defense, luck, actual, games, which, pitched, statistic, first, devised, voros, mccracken, 1999, page. In baseball statistics defense independent ERA dERA is a statistic that projects what a pitcher s earned run average ERA would have been if not for the effects of defense and luck on the actual games in which he pitched The statistic was first devised by Voros McCracken in 1999 1 2 page needed Contents 1 Method 2 Alternative formulation 3 See also 4 References 5 External linksMethod editVersion 2 0 of dERA uses the following statistics batters faced Home runs allowed Base on balls Intentional base on balls Strikeouts Hit by pitch 0 Multiply BFP by 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 Alternative formulation edit0 d I B B 0 9926 I B B displaystyle rm dIBB 0 9926 IBB nbsp 1 d H B H B B F P d I B B B F P I B B displaystyle rm dHB HB left frac BFP dIBB BFP IBB right nbsp 2 d B B B B I B B B F P d I B B d H B B F P I B B H B I B B displaystyle rm dBB BB IBB left frac BFP dIBB dHB BFP IBB HB right IBB nbsp 3 d K K B F P d I B B d H B B F P I B B H B displaystyle rm dK K left frac BFP dIBB dHB BFP IBB HB right nbsp 4 d H R H R B F P d H B d B B d K B F P H B B B K displaystyle rm dHR HR left frac BFP dHB dBB dK BFP HB BB K right nbsp See also editEarned run Earned run average Component ERA PERA QERAReferences edit Wisewell Aaron 2013 01 28 articles with dead external links 5d 5d 5b 5bCategory Articles with dead external links 5d 5d 5b 5bWikipedia Link rot dead link 5d 5d The Baseball Coach Lulu Press Inc ISBN 978 1 105 60123 1 a href Template Cite book html title Template Cite book cite book a Check url value help Click James Keri Jonah 2006 03 06 Baseball Between the Numbers Why Everything You Know about the Game is Wrong Basic Books ISBN 978 0 465 00596 3 External links editDefense Independent Pitching Stats Retrieved from https en wikipedia org w index php title Defense independent ERA amp oldid 1172835741, wikipedia, wiki, book, books, library,
