Stat of the Day Thread

[Rdsxmbnt]

This idea came to me, there's a lot of baseball stats out there such as OBP, ERA+, Isop, DIPS, VORP, etc. and although some here do have a pretty good understanding of what they mean and how to use them, most probaly dont. So this thread will be updated daily with a new stat to read about so people aren't left in the dark at places like sosh, soxprospects or even here. Rather than dumping all stats at once (in which case you could just use a glossary) I'll just do one at a time. Feel free to just read/comment/add/etc.

 

Ok stat(s) of the day: BA/OBP%/SLG%/OPS

 

ok today is a joint-stat day to cover some of the basics. First up there is a common set of numbers you'll find on a player's ESPN page for example and put in the order of Batting Average (BA)/ On Base Percentage (OBP)/ Slugging Percentage (SLG)/ On Base Percentage Plus Slugging (OPS) Percentage.

 

Heres an example: Kevin Youkillis .307/.403/.476/.879

 

Batting Average: Pretty basic, as you can seeing Youkillis is batting .307. Now the way to calculate that is: Hits divided by At-Bats. Youkillis has 109 hits divided by 355 At-Bats ~ .307.

 

On Base Percentage: Unlike batting average now walks, and hit-by-pitches are included. So basically to find it: (Hits + Walks + HBP) divided by (At-Bats + Walks + HBP + Sacrifices).

So Youk has (109 hits + 51 Walks + 9 HBP) divided by (355 AB + 51 Walks + 9 HBP + 4 SF) ~ .403

 

Sluggin Percentage: Now this involves hits and at-bats however now you use Total-Bases instead of hits. To find SLG you need to find a players total bases. This only includes hits (singles, doubles, triples, HR). So a single is one base, double is 2 bases, triple is 3 bases and HR is 4 bases. So if a player only hit singles then his SLG would be the same as his BA since it would just be for example with Youk 109/355 again. Youk however hits for some power so after adding his total bases it comes to: 169 total bases divided by 355 AB ~ .470.

 

On Base Percentage plus Slugging Percentage: Real simple, just take the players OBP and SLG and add them together. For example Youk has a .403 OBP and a .470 SLG, add them together and his OPS is .879.

[Rdsxmbnt]

Stat(s) of the day: IsoP and IsoB

 

IsoP: Isolated Power, measures how much power a hitter is hitting for. Real simple to calculate, just take a players SLG% - BA. For example David Ortiz has .566 SLG this year and a .321 BA, so his IsoP is .566-.321 = .245. By contrast his SLG last year was .636 and his BA was .287 so his IsoP last year was .349. and you don't need to be an expert to tell his power is way down this year.

 

IsoB: Isolated Patience, similar to isolated power but this deals with OBP. To calculate take a players OBP% - BA. Again with the David Ortiz example, he has a .432 OBP - .321 BA = .111 IsoB (which is very good). Then take last year he had a .413 OBP - .287 BA = .126 IsoB, down from last year but he's getting a lot more hits so make up for that.

[redsoxrules]

great info , you can find this info here too

http://www.talksox.com/forum/general-baseball-talk/4302-baseball-terms-definitions.html

[Rdsxmbnt]

wow thats pretty good, didnt know we had something like that