Park Factors

GoPedro99 · 03-27-2019, 09:27 AM

anyone else seeing an issue with park factors? for almost every park the AVG and HR factors are identical to each other as well as identical between R and L. this seems like it is incorrect. anyone else seeing this?

pstrickert · 03-27-2019, 10:46 AM

Mike Garlon developed the formula for park factors. This is how he explained it:

I created all of the park factors used for OOTP. They are indeed based on the park effect on runs. What is done for each season and each park is take the park's 3-yr factor on runs and then create an appropriate increase or decrease in hits and HR that reproduce that park's impact on scoring runs. Each season this value needs to be recalculated using a quadratic equation because the distribution of singles, doubles, triples, and HRs and their impact on scoring changes each season in history.

I'm sure many think that it seems odd that the doubles and triples factors are always at 1.00, but actually when you change the BA factor to say 1.05 you are also raising doubles and triples by 5% as well simply because you are generating that many more hits overall, so we don't need an additional factor for doubles and triples as it is implied.

So basically it's one factor that is being used across BA/2B/3B/HR in order to replicate the scoring environment. If scoring is up say 10% in a given park, you need only boost all hits by a fraction of that amount, calculated through a quadratic equation, in order to reproduce the same scoring affect the park should have.

GoPedro99 · 03-27-2019, 10:53 AM

i know how they are formulated, however based on what they were last year, and in years past, they most definitely look incorrect. for example. PNC park, the AVG factors are

OOTP XX
.986/.986/.986 for average
.986/.986/.986 for HR

Minute maid is
1.014/1.014/1.014 for average
1.014/1.014/1.014 for HR

in OOTP 19 they were
PNC
1.010/.990/1.020 AVG
.894/.920/.880 HR

Minute Maid
.986/.980/.990 average
1.050/1.050/1.050 HR

waittilnextyear · 03-27-2019, 11:05 AM

Hmmm, I actually have looked into this recently.

http://www.ootpdevelopments.com/boar...d.php?t=300927

I don't claim that anything is perfect, but feel free to use these data if you want to.

pstrickert · 03-27-2019, 11:09 AM

Send a PM to Garlon, if you have questions.

03-27-2019, 09:27 AM	#1
GoPedro99 All Star Reserve Join Date: Nov 2015 Posts: 856	Park Factors anyone else seeing an issue with park factors? for almost every park the AVG and HR factors are identical to each other as well as identical between R and L. this seems like it is incorrect. anyone else seeing this?

03-27-2019, 10:46 AM	#2
pstrickert Hall Of Famer Join Date: Dec 2005 Posts: 15,726	Mike Garlon developed the formula for park factors. This is how he explained it: I created all of the park factors used for OOTP. They are indeed based on the park effect on runs. What is done for each season and each park is take the park's 3-yr factor on runs and then create an appropriate increase or decrease in hits and HR that reproduce that park's impact on scoring runs. Each season this value needs to be recalculated using a quadratic equation because the distribution of singles, doubles, triples, and HRs and their impact on scoring changes each season in history. I'm sure many think that it seems odd that the doubles and triples factors are always at 1.00, but actually when you change the BA factor to say 1.05 you are also raising doubles and triples by 5% as well simply because you are generating that many more hits overall, so we don't need an additional factor for doubles and triples as it is implied. So basically it's one factor that is being used across BA/2B/3B/HR in order to replicate the scoring environment. If scoring is up say 10% in a given park, you need only boost all hits by a fraction of that amount, calculated through a quadratic equation, in order to reproduce the same scoring affect the park should have.

03-27-2019, 10:53 AM	#3
GoPedro99 All Star Reserve Join Date: Nov 2015 Posts: 856	i know how they are formulated, however based on what they were last year, and in years past, they most definitely look incorrect. for example. PNC park, the AVG factors are OOTP XX .986/.986/.986 for average .986/.986/.986 for HR Minute maid is 1.014/1.014/1.014 for average 1.014/1.014/1.014 for HR in OOTP 19 they were PNC 1.010/.990/1.020 AVG .894/.920/.880 HR Minute Maid .986/.980/.990 average 1.050/1.050/1.050 HR

03-27-2019, 11:05 AM	#4
waittilnextyear All Star Starter Join Date: Jan 2016 Posts: 1,272	Hmmm, I actually have looked into this recently. http://www.ootpdevelopments.com/boar...d.php?t=300927 I don't claim that anything is perfect, but feel free to use these data if you want to.

03-27-2019, 11:09 AM	#5
pstrickert Hall Of Famer Join Date: Dec 2005 Posts: 15,726	Send a PM to Garlon, if you have questions.